7a2bb23c14
Signed-off-by: Eric Bénard <eric@eukrea.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
967 lines
22 KiB
C
967 lines
22 KiB
C
/*
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* Freescale i.MX Frame Buffer device driver
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*
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* Copyright (C) 2004 Sascha Hauer, Pengutronix
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* Based on acornfb.c Copyright (C) Russell King.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* Please direct your questions and comments on this driver to the following
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* email address:
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*
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* linux-arm-kernel@lists.arm.linux.org.uk
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/fb.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/cpufreq.h>
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/math64.h>
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#include <mach/imxfb.h>
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#include <mach/hardware.h>
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/*
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* Complain if VAR is out of range.
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*/
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#define DEBUG_VAR 1
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#define DRIVER_NAME "imx-fb"
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#define LCDC_SSA 0x00
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#define LCDC_SIZE 0x04
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#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
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#ifdef CONFIG_ARCH_MX1
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#define SIZE_YMAX(y) ((y) & 0x1ff)
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#else
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#define SIZE_YMAX(y) ((y) & 0x3ff)
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#endif
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#define LCDC_VPW 0x08
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#define VPW_VPW(x) ((x) & 0x3ff)
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#define LCDC_CPOS 0x0C
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#define CPOS_CC1 (1<<31)
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#define CPOS_CC0 (1<<30)
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#define CPOS_OP (1<<28)
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#define CPOS_CXP(x) (((x) & 3ff) << 16)
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#ifdef CONFIG_ARCH_MX1
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#define CPOS_CYP(y) ((y) & 0x1ff)
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#else
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#define CPOS_CYP(y) ((y) & 0x3ff)
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#endif
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#define LCDC_LCWHB 0x10
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#define LCWHB_BK_EN (1<<31)
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#define LCWHB_CW(w) (((w) & 0x1f) << 24)
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#define LCWHB_CH(h) (((h) & 0x1f) << 16)
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#define LCWHB_BD(x) ((x) & 0xff)
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#define LCDC_LCHCC 0x14
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#ifdef CONFIG_ARCH_MX1
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#define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
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#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
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#define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
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#else
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#define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
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#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
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#define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
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#endif
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#define LCDC_PCR 0x18
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#define LCDC_HCR 0x1C
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#define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
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#define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
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#define HCR_H_WAIT_2(x) ((x) & 0xff)
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#define LCDC_VCR 0x20
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#define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
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#define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
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#define VCR_V_WAIT_2(x) ((x) & 0xff)
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#define LCDC_POS 0x24
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#define POS_POS(x) ((x) & 1f)
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#define LCDC_LSCR1 0x28
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/* bit fields in imxfb.h */
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#define LCDC_PWMR 0x2C
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/* bit fields in imxfb.h */
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#define LCDC_DMACR 0x30
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/* bit fields in imxfb.h */
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#define LCDC_RMCR 0x34
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#ifdef CONFIG_ARCH_MX1
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#define RMCR_LCDC_EN (1<<1)
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#else
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#define RMCR_LCDC_EN 0
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#endif
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#define RMCR_SELF_REF (1<<0)
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#define LCDC_LCDICR 0x38
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#define LCDICR_INT_SYN (1<<2)
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#define LCDICR_INT_CON (1)
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#define LCDC_LCDISR 0x40
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#define LCDISR_UDR_ERR (1<<3)
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#define LCDISR_ERR_RES (1<<2)
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#define LCDISR_EOF (1<<1)
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#define LCDISR_BOF (1<<0)
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/* Used fb-mode. Can be set on kernel command line, therefore file-static. */
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static const char *fb_mode;
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/*
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* These are the bitfields for each
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* display depth that we support.
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*/
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struct imxfb_rgb {
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struct fb_bitfield red;
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struct fb_bitfield green;
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struct fb_bitfield blue;
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struct fb_bitfield transp;
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};
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struct imxfb_info {
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struct platform_device *pdev;
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void __iomem *regs;
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struct clk *clk;
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/*
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* These are the addresses we mapped
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* the framebuffer memory region to.
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*/
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dma_addr_t map_dma;
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u_char *map_cpu;
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u_int map_size;
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u_char *screen_cpu;
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dma_addr_t screen_dma;
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u_int palette_size;
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dma_addr_t dbar1;
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dma_addr_t dbar2;
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u_int pcr;
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u_int pwmr;
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u_int lscr1;
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u_int dmacr;
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u_int cmap_inverse:1,
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cmap_static:1,
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unused:30;
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struct imx_fb_videomode *mode;
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int num_modes;
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struct backlight_device *bl;
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void (*lcd_power)(int);
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void (*backlight_power)(int);
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};
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#define IMX_NAME "IMX"
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/*
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* Minimum X and Y resolutions
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*/
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#define MIN_XRES 64
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#define MIN_YRES 64
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/* Actually this really is 18bit support, the lowest 2 bits of each colour
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* are unused in hardware. We claim to have 24bit support to make software
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* like X work, which does not support 18bit.
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*/
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static struct imxfb_rgb def_rgb_18 = {
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.red = {.offset = 16, .length = 8,},
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.green = {.offset = 8, .length = 8,},
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.blue = {.offset = 0, .length = 8,},
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.transp = {.offset = 0, .length = 0,},
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};
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static struct imxfb_rgb def_rgb_16_tft = {
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.red = {.offset = 11, .length = 5,},
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.green = {.offset = 5, .length = 6,},
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.blue = {.offset = 0, .length = 5,},
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.transp = {.offset = 0, .length = 0,},
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};
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static struct imxfb_rgb def_rgb_16_stn = {
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.red = {.offset = 8, .length = 4,},
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.green = {.offset = 4, .length = 4,},
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.blue = {.offset = 0, .length = 4,},
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.transp = {.offset = 0, .length = 0,},
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};
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static struct imxfb_rgb def_rgb_8 = {
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.red = {.offset = 0, .length = 8,},
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.green = {.offset = 0, .length = 8,},
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.blue = {.offset = 0, .length = 8,},
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.transp = {.offset = 0, .length = 0,},
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};
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static int imxfb_activate_var(struct fb_var_screeninfo *var,
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struct fb_info *info);
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static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
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{
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chan &= 0xffff;
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chan >>= 16 - bf->length;
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return chan << bf->offset;
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}
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static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
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u_int trans, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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u_int val, ret = 1;
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#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
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if (regno < fbi->palette_size) {
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val = (CNVT_TOHW(red, 4) << 8) |
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(CNVT_TOHW(green,4) << 4) |
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CNVT_TOHW(blue, 4);
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writel(val, fbi->regs + 0x800 + (regno << 2));
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ret = 0;
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}
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return ret;
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}
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static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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u_int trans, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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unsigned int val;
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int ret = 1;
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/*
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* If inverse mode was selected, invert all the colours
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* rather than the register number. The register number
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* is what you poke into the framebuffer to produce the
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* colour you requested.
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*/
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if (fbi->cmap_inverse) {
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red = 0xffff - red;
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green = 0xffff - green;
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blue = 0xffff - blue;
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}
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/*
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* If greyscale is true, then we convert the RGB value
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* to greyscale no mater what visual we are using.
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*/
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if (info->var.grayscale)
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red = green = blue = (19595 * red + 38470 * green +
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7471 * blue) >> 16;
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switch (info->fix.visual) {
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case FB_VISUAL_TRUECOLOR:
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/*
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* 12 or 16-bit True Colour. We encode the RGB value
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* according to the RGB bitfield information.
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*/
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if (regno < 16) {
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u32 *pal = info->pseudo_palette;
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val = chan_to_field(red, &info->var.red);
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val |= chan_to_field(green, &info->var.green);
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val |= chan_to_field(blue, &info->var.blue);
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pal[regno] = val;
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ret = 0;
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}
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break;
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case FB_VISUAL_STATIC_PSEUDOCOLOR:
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case FB_VISUAL_PSEUDOCOLOR:
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ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
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break;
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}
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return ret;
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}
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static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi)
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{
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struct imx_fb_videomode *m;
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int i;
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for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) {
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if (!strcmp(m->mode.name, fb_mode))
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return m;
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}
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return NULL;
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}
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/*
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* imxfb_check_var():
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* Round up in the following order: bits_per_pixel, xres,
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* yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
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* bitfields, horizontal timing, vertical timing.
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*/
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static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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struct imxfb_rgb *rgb;
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const struct imx_fb_videomode *imxfb_mode;
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unsigned long lcd_clk;
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unsigned long long tmp;
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u32 pcr = 0;
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if (var->xres < MIN_XRES)
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var->xres = MIN_XRES;
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if (var->yres < MIN_YRES)
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var->yres = MIN_YRES;
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imxfb_mode = imxfb_find_mode(fbi);
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if (!imxfb_mode)
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return -EINVAL;
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var->xres = imxfb_mode->mode.xres;
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var->yres = imxfb_mode->mode.yres;
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var->bits_per_pixel = imxfb_mode->bpp;
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var->pixclock = imxfb_mode->mode.pixclock;
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var->hsync_len = imxfb_mode->mode.hsync_len;
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var->left_margin = imxfb_mode->mode.left_margin;
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var->right_margin = imxfb_mode->mode.right_margin;
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var->vsync_len = imxfb_mode->mode.vsync_len;
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var->upper_margin = imxfb_mode->mode.upper_margin;
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var->lower_margin = imxfb_mode->mode.lower_margin;
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var->sync = imxfb_mode->mode.sync;
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var->xres_virtual = max(var->xres_virtual, var->xres);
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var->yres_virtual = max(var->yres_virtual, var->yres);
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pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
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lcd_clk = clk_get_rate(fbi->clk);
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tmp = var->pixclock * (unsigned long long)lcd_clk;
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do_div(tmp, 1000000);
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if (do_div(tmp, 1000000) > 500000)
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tmp++;
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pcr = (unsigned int)tmp;
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if (--pcr > 0x3F) {
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pcr = 0x3F;
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printk(KERN_WARNING "Must limit pixel clock to %luHz\n",
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lcd_clk / pcr);
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}
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switch (var->bits_per_pixel) {
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case 32:
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pcr |= PCR_BPIX_18;
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rgb = &def_rgb_18;
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break;
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case 16:
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default:
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if (cpu_is_mx1())
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pcr |= PCR_BPIX_12;
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else
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pcr |= PCR_BPIX_16;
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if (imxfb_mode->pcr & PCR_TFT)
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rgb = &def_rgb_16_tft;
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else
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rgb = &def_rgb_16_stn;
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break;
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case 8:
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pcr |= PCR_BPIX_8;
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rgb = &def_rgb_8;
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break;
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}
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/* add sync polarities */
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pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25));
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fbi->pcr = pcr;
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/*
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* Copy the RGB parameters for this display
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* from the machine specific parameters.
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*/
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var->red = rgb->red;
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var->green = rgb->green;
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var->blue = rgb->blue;
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var->transp = rgb->transp;
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pr_debug("RGBT length = %d:%d:%d:%d\n",
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var->red.length, var->green.length, var->blue.length,
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var->transp.length);
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pr_debug("RGBT offset = %d:%d:%d:%d\n",
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var->red.offset, var->green.offset, var->blue.offset,
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var->transp.offset);
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return 0;
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}
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/*
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* imxfb_set_par():
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* Set the user defined part of the display for the specified console
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*/
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static int imxfb_set_par(struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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struct fb_var_screeninfo *var = &info->var;
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if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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else if (!fbi->cmap_static)
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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else {
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/*
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* Some people have weird ideas about wanting static
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* pseudocolor maps. I suspect their user space
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* applications are broken.
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*/
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info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
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}
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info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
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fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
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imxfb_activate_var(var, info);
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return 0;
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}
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static int imxfb_bl_get_brightness(struct backlight_device *bl)
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{
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struct imxfb_info *fbi = bl_get_data(bl);
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return readl(fbi->regs + LCDC_PWMR) & 0xFF;
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}
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static int imxfb_bl_update_status(struct backlight_device *bl)
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{
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struct imxfb_info *fbi = bl_get_data(bl);
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int brightness = bl->props.brightness;
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if (bl->props.power != FB_BLANK_UNBLANK)
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brightness = 0;
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if (bl->props.fb_blank != FB_BLANK_UNBLANK)
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brightness = 0;
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fbi->pwmr = (fbi->pwmr & ~0xFF) | brightness;
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if (bl->props.fb_blank != FB_BLANK_UNBLANK)
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clk_enable(fbi->clk);
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writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
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if (bl->props.fb_blank != FB_BLANK_UNBLANK)
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clk_disable(fbi->clk);
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return 0;
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}
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static const struct backlight_ops imxfb_lcdc_bl_ops = {
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.update_status = imxfb_bl_update_status,
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.get_brightness = imxfb_bl_get_brightness,
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};
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static void imxfb_init_backlight(struct imxfb_info *fbi)
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{
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struct backlight_properties props;
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struct backlight_device *bl;
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if (fbi->bl)
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return;
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memset(&props, 0, sizeof(struct backlight_properties));
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props.max_brightness = 0xff;
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writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
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bl = backlight_device_register("imxfb-bl", &fbi->pdev->dev, fbi,
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&imxfb_lcdc_bl_ops, &props);
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if (IS_ERR(bl)) {
|
|
dev_err(&fbi->pdev->dev, "error %ld on backlight register\n",
|
|
PTR_ERR(bl));
|
|
return;
|
|
}
|
|
|
|
fbi->bl = bl;
|
|
bl->props.power = FB_BLANK_UNBLANK;
|
|
bl->props.fb_blank = FB_BLANK_UNBLANK;
|
|
bl->props.brightness = imxfb_bl_get_brightness(bl);
|
|
}
|
|
|
|
static void imxfb_exit_backlight(struct imxfb_info *fbi)
|
|
{
|
|
if (fbi->bl)
|
|
backlight_device_unregister(fbi->bl);
|
|
}
|
|
|
|
static void imxfb_enable_controller(struct imxfb_info *fbi)
|
|
{
|
|
pr_debug("Enabling LCD controller\n");
|
|
|
|
writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
|
|
|
|
/* panning offset 0 (0 pixel offset) */
|
|
writel(0x00000000, fbi->regs + LCDC_POS);
|
|
|
|
/* disable hardware cursor */
|
|
writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
|
|
fbi->regs + LCDC_CPOS);
|
|
|
|
writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
|
|
|
|
clk_enable(fbi->clk);
|
|
|
|
if (fbi->backlight_power)
|
|
fbi->backlight_power(1);
|
|
if (fbi->lcd_power)
|
|
fbi->lcd_power(1);
|
|
}
|
|
|
|
static void imxfb_disable_controller(struct imxfb_info *fbi)
|
|
{
|
|
pr_debug("Disabling LCD controller\n");
|
|
|
|
if (fbi->backlight_power)
|
|
fbi->backlight_power(0);
|
|
if (fbi->lcd_power)
|
|
fbi->lcd_power(0);
|
|
|
|
clk_disable(fbi->clk);
|
|
|
|
writel(0, fbi->regs + LCDC_RMCR);
|
|
}
|
|
|
|
static int imxfb_blank(int blank, struct fb_info *info)
|
|
{
|
|
struct imxfb_info *fbi = info->par;
|
|
|
|
pr_debug("imxfb_blank: blank=%d\n", blank);
|
|
|
|
switch (blank) {
|
|
case FB_BLANK_POWERDOWN:
|
|
case FB_BLANK_VSYNC_SUSPEND:
|
|
case FB_BLANK_HSYNC_SUSPEND:
|
|
case FB_BLANK_NORMAL:
|
|
imxfb_disable_controller(fbi);
|
|
break;
|
|
|
|
case FB_BLANK_UNBLANK:
|
|
imxfb_enable_controller(fbi);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops imxfb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_check_var = imxfb_check_var,
|
|
.fb_set_par = imxfb_set_par,
|
|
.fb_setcolreg = imxfb_setcolreg,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
.fb_blank = imxfb_blank,
|
|
};
|
|
|
|
/*
|
|
* imxfb_activate_var():
|
|
* Configures LCD Controller based on entries in var parameter. Settings are
|
|
* only written to the controller if changes were made.
|
|
*/
|
|
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
struct imxfb_info *fbi = info->par;
|
|
|
|
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
|
|
var->xres, var->hsync_len,
|
|
var->left_margin, var->right_margin);
|
|
pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
|
|
var->yres, var->vsync_len,
|
|
var->upper_margin, var->lower_margin);
|
|
|
|
#if DEBUG_VAR
|
|
if (var->xres < 16 || var->xres > 1024)
|
|
printk(KERN_ERR "%s: invalid xres %d\n",
|
|
info->fix.id, var->xres);
|
|
if (var->hsync_len < 1 || var->hsync_len > 64)
|
|
printk(KERN_ERR "%s: invalid hsync_len %d\n",
|
|
info->fix.id, var->hsync_len);
|
|
if (var->left_margin > 255)
|
|
printk(KERN_ERR "%s: invalid left_margin %d\n",
|
|
info->fix.id, var->left_margin);
|
|
if (var->right_margin > 255)
|
|
printk(KERN_ERR "%s: invalid right_margin %d\n",
|
|
info->fix.id, var->right_margin);
|
|
if (var->yres < 1 || var->yres > 511)
|
|
printk(KERN_ERR "%s: invalid yres %d\n",
|
|
info->fix.id, var->yres);
|
|
if (var->vsync_len > 100)
|
|
printk(KERN_ERR "%s: invalid vsync_len %d\n",
|
|
info->fix.id, var->vsync_len);
|
|
if (var->upper_margin > 63)
|
|
printk(KERN_ERR "%s: invalid upper_margin %d\n",
|
|
info->fix.id, var->upper_margin);
|
|
if (var->lower_margin > 255)
|
|
printk(KERN_ERR "%s: invalid lower_margin %d\n",
|
|
info->fix.id, var->lower_margin);
|
|
#endif
|
|
|
|
/* physical screen start address */
|
|
writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4),
|
|
fbi->regs + LCDC_VPW);
|
|
|
|
writel(HCR_H_WIDTH(var->hsync_len - 1) |
|
|
HCR_H_WAIT_1(var->right_margin - 1) |
|
|
HCR_H_WAIT_2(var->left_margin - 3),
|
|
fbi->regs + LCDC_HCR);
|
|
|
|
writel(VCR_V_WIDTH(var->vsync_len) |
|
|
VCR_V_WAIT_1(var->lower_margin) |
|
|
VCR_V_WAIT_2(var->upper_margin),
|
|
fbi->regs + LCDC_VCR);
|
|
|
|
writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
|
|
fbi->regs + LCDC_SIZE);
|
|
|
|
writel(fbi->pcr, fbi->regs + LCDC_PCR);
|
|
writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
|
|
writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
/*
|
|
* Power management hooks. Note that we won't be called from IRQ context,
|
|
* unlike the blank functions above, so we may sleep.
|
|
*/
|
|
static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
struct imxfb_info *fbi = info->par;
|
|
|
|
pr_debug("%s\n", __func__);
|
|
|
|
imxfb_disable_controller(fbi);
|
|
return 0;
|
|
}
|
|
|
|
static int imxfb_resume(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
struct imxfb_info *fbi = info->par;
|
|
|
|
pr_debug("%s\n", __func__);
|
|
|
|
imxfb_enable_controller(fbi);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define imxfb_suspend NULL
|
|
#define imxfb_resume NULL
|
|
#endif
|
|
|
|
static int __init imxfb_init_fbinfo(struct platform_device *pdev)
|
|
{
|
|
struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
|
|
struct fb_info *info = dev_get_drvdata(&pdev->dev);
|
|
struct imxfb_info *fbi = info->par;
|
|
struct imx_fb_videomode *m;
|
|
int i;
|
|
|
|
pr_debug("%s\n",__func__);
|
|
|
|
info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
|
|
if (!info->pseudo_palette)
|
|
return -ENOMEM;
|
|
|
|
memset(fbi, 0, sizeof(struct imxfb_info));
|
|
|
|
strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
|
|
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.type_aux = 0;
|
|
info->fix.xpanstep = 0;
|
|
info->fix.ypanstep = 0;
|
|
info->fix.ywrapstep = 0;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
|
|
info->var.nonstd = 0;
|
|
info->var.activate = FB_ACTIVATE_NOW;
|
|
info->var.height = -1;
|
|
info->var.width = -1;
|
|
info->var.accel_flags = 0;
|
|
info->var.vmode = FB_VMODE_NONINTERLACED;
|
|
|
|
info->fbops = &imxfb_ops;
|
|
info->flags = FBINFO_FLAG_DEFAULT |
|
|
FBINFO_READS_FAST;
|
|
info->var.grayscale = pdata->cmap_greyscale;
|
|
fbi->cmap_inverse = pdata->cmap_inverse;
|
|
fbi->cmap_static = pdata->cmap_static;
|
|
fbi->lscr1 = pdata->lscr1;
|
|
fbi->dmacr = pdata->dmacr;
|
|
fbi->pwmr = pdata->pwmr;
|
|
fbi->lcd_power = pdata->lcd_power;
|
|
fbi->backlight_power = pdata->backlight_power;
|
|
|
|
for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++)
|
|
info->fix.smem_len = max_t(size_t, info->fix.smem_len,
|
|
m->mode.xres * m->mode.yres * m->bpp / 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init imxfb_probe(struct platform_device *pdev)
|
|
{
|
|
struct imxfb_info *fbi;
|
|
struct fb_info *info;
|
|
struct imx_fb_platform_data *pdata;
|
|
struct resource *res;
|
|
int ret, i;
|
|
|
|
dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -ENODEV;
|
|
|
|
pdata = pdev->dev.platform_data;
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev,"No platform_data available\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
fbi = info->par;
|
|
|
|
if (!fb_mode)
|
|
fb_mode = pdata->mode[0].mode.name;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
ret = imxfb_init_fbinfo(pdev);
|
|
if (ret < 0)
|
|
goto failed_init;
|
|
|
|
res = request_mem_region(res->start, resource_size(res),
|
|
DRIVER_NAME);
|
|
if (!res) {
|
|
ret = -EBUSY;
|
|
goto failed_req;
|
|
}
|
|
|
|
fbi->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(fbi->clk)) {
|
|
ret = PTR_ERR(fbi->clk);
|
|
dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
|
|
goto failed_getclock;
|
|
}
|
|
|
|
fbi->regs = ioremap(res->start, resource_size(res));
|
|
if (fbi->regs == NULL) {
|
|
dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
|
|
goto failed_ioremap;
|
|
}
|
|
|
|
if (!pdata->fixed_screen_cpu) {
|
|
fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
|
|
fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
|
|
fbi->map_size, &fbi->map_dma, GFP_KERNEL);
|
|
|
|
if (!fbi->map_cpu) {
|
|
dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
|
|
ret = -ENOMEM;
|
|
goto failed_map;
|
|
}
|
|
|
|
info->screen_base = fbi->map_cpu;
|
|
fbi->screen_cpu = fbi->map_cpu;
|
|
fbi->screen_dma = fbi->map_dma;
|
|
info->fix.smem_start = fbi->screen_dma;
|
|
} else {
|
|
/* Fixed framebuffer mapping enables location of the screen in eSRAM */
|
|
fbi->map_cpu = pdata->fixed_screen_cpu;
|
|
fbi->map_dma = pdata->fixed_screen_dma;
|
|
info->screen_base = fbi->map_cpu;
|
|
fbi->screen_cpu = fbi->map_cpu;
|
|
fbi->screen_dma = fbi->map_dma;
|
|
info->fix.smem_start = fbi->screen_dma;
|
|
}
|
|
|
|
if (pdata->init) {
|
|
ret = pdata->init(fbi->pdev);
|
|
if (ret)
|
|
goto failed_platform_init;
|
|
}
|
|
|
|
fbi->mode = pdata->mode;
|
|
fbi->num_modes = pdata->num_modes;
|
|
|
|
INIT_LIST_HEAD(&info->modelist);
|
|
for (i = 0; i < pdata->num_modes; i++)
|
|
fb_add_videomode(&pdata->mode[i].mode, &info->modelist);
|
|
|
|
/*
|
|
* This makes sure that our colour bitfield
|
|
* descriptors are correctly initialised.
|
|
*/
|
|
imxfb_check_var(&info->var, info);
|
|
|
|
ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
|
|
if (ret < 0)
|
|
goto failed_cmap;
|
|
|
|
imxfb_set_par(info);
|
|
ret = register_framebuffer(info);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "failed to register framebuffer\n");
|
|
goto failed_register;
|
|
}
|
|
|
|
imxfb_enable_controller(fbi);
|
|
fbi->pdev = pdev;
|
|
imxfb_init_backlight(fbi);
|
|
|
|
return 0;
|
|
|
|
failed_register:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
failed_cmap:
|
|
if (pdata->exit)
|
|
pdata->exit(fbi->pdev);
|
|
failed_platform_init:
|
|
if (!pdata->fixed_screen_cpu)
|
|
dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
|
|
fbi->map_dma);
|
|
failed_map:
|
|
clk_put(fbi->clk);
|
|
failed_getclock:
|
|
iounmap(fbi->regs);
|
|
failed_ioremap:
|
|
release_mem_region(res->start, resource_size(res));
|
|
failed_req:
|
|
kfree(info->pseudo_palette);
|
|
failed_init:
|
|
platform_set_drvdata(pdev, NULL);
|
|
framebuffer_release(info);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit imxfb_remove(struct platform_device *pdev)
|
|
{
|
|
struct imx_fb_platform_data *pdata;
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct imxfb_info *fbi = info->par;
|
|
struct resource *res;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
imxfb_disable_controller(fbi);
|
|
|
|
imxfb_exit_backlight(fbi);
|
|
unregister_framebuffer(info);
|
|
|
|
pdata = pdev->dev.platform_data;
|
|
if (pdata->exit)
|
|
pdata->exit(fbi->pdev);
|
|
|
|
fb_dealloc_cmap(&info->cmap);
|
|
kfree(info->pseudo_palette);
|
|
framebuffer_release(info);
|
|
|
|
iounmap(fbi->regs);
|
|
release_mem_region(res->start, resource_size(res));
|
|
clk_disable(fbi->clk);
|
|
clk_put(fbi->clk);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void imxfb_shutdown(struct platform_device * dev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
struct imxfb_info *fbi = info->par;
|
|
imxfb_disable_controller(fbi);
|
|
}
|
|
|
|
static struct platform_driver imxfb_driver = {
|
|
.suspend = imxfb_suspend,
|
|
.resume = imxfb_resume,
|
|
.remove = __devexit_p(imxfb_remove),
|
|
.shutdown = imxfb_shutdown,
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
};
|
|
|
|
static int imxfb_setup(void)
|
|
{
|
|
#ifndef MODULE
|
|
char *opt, *options = NULL;
|
|
|
|
if (fb_get_options("imxfb", &options))
|
|
return -ENODEV;
|
|
|
|
if (!options || !*options)
|
|
return 0;
|
|
|
|
while ((opt = strsep(&options, ",")) != NULL) {
|
|
if (!*opt)
|
|
continue;
|
|
else
|
|
fb_mode = opt;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int __init imxfb_init(void)
|
|
{
|
|
int ret = imxfb_setup();
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return platform_driver_probe(&imxfb_driver, imxfb_probe);
|
|
}
|
|
|
|
static void __exit imxfb_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&imxfb_driver);
|
|
}
|
|
|
|
module_init(imxfb_init);
|
|
module_exit(imxfb_cleanup);
|
|
|
|
MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
|
|
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
|
|
MODULE_LICENSE("GPL");
|