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drm/radeon/kms: add support for hw i2c on r1xx-r5xx

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wire hw i2c support into radeon i2c algo.

fixes merged:
- handle bus probing correctly
- use meaningful error numbers
- abort if transaction fails
- The line mapping is different depending on the asic.
- protect hw i2c engine with a mutex
- rs300 doesn't have a pin select bit
- r200 has a different pin select setup

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-12-23 03:23:21 -05:00 committed by Dave Airlie
parent 5a6f98f5bf
commit 40bacf1631
6 changed files with 736 additions and 82 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

100
drivers/gpu/drm/radeon/r500_reg.h
View file

@ -717,54 +717,62 @@
#define AVIVO_DVOA_BIT_DEPTH_CONTROL 0x7988
#define AVIVO_DC_GPIO_HPD_A 0x7e94
#define AVIVO_GPIO_0 0x7e30
#define AVIVO_GPIO_1 0x7e40
#define AVIVO_GPIO_2 0x7e50
#define AVIVO_GPIO_3 0x7e60
#define AVIVO_DC_GPIO_HPD_Y 0x7e9c
#define AVIVO_I2C_STATUS 0x7d30
# define AVIVO_I2C_STATUS_DONE (1 << 0)
# define AVIVO_I2C_STATUS_NACK (1 << 1)
# define AVIVO_I2C_STATUS_HALT (1 << 2)
# define AVIVO_I2C_STATUS_GO (1 << 3)
# define AVIVO_I2C_STATUS_MASK 0x7
/* If radeon_mm_i2c is to be believed, this is HALT, NACK, and maybe
* DONE? */
# define AVIVO_I2C_STATUS_CMD_RESET 0x7
# define AVIVO_I2C_STATUS_CMD_WAIT (1 << 3)
#define AVIVO_I2C_STOP 0x7d34
#define AVIVO_I2C_START_CNTL 0x7d38
# define AVIVO_I2C_START (1 << 8)
# define AVIVO_I2C_CONNECTOR0 (0 << 16)
# define AVIVO_I2C_CONNECTOR1 (1 << 16)
#define R520_I2C_START (1<<0)
#define R520_I2C_STOP (1<<1)
#define R520_I2C_RX (1<<2)
#define R520_I2C_EN (1<<8)
#define R520_I2C_DDC1 (0<<16)
#define R520_I2C_DDC2 (1<<16)
#define R520_I2C_DDC3 (2<<16)
#define R520_I2C_DDC_MASK (3<<16)
#define AVIVO_I2C_CONTROL2 0x7d3c
# define AVIVO_I2C_7D3C_SIZE_SHIFT 8
# define AVIVO_I2C_7D3C_SIZE_MASK (0xf << 8)
#define AVIVO_I2C_CONTROL3 0x7d40
/* Reading is done 4 bytes at a time: read the bottom 8 bits from
* 7d44, four times in a row.
* Writing is a little more complex. First write DATA with
* 0xnnnnnnzz, then 0xnnnnnnyy, where nnnnnn is some non-deterministic
* magic number, zz is, I think, the slave address, and yy is the byte
* you want to write. */
#define AVIVO_I2C_DATA 0x7d44
#define R520_I2C_ADDR_COUNT_MASK (0x7)
#define R520_I2C_DATA_COUNT_SHIFT (8)
#define R520_I2C_DATA_COUNT_MASK (0xF00)
#define AVIVO_I2C_CNTL 0x7d50
# define AVIVO_I2C_EN (1 << 0)
# define AVIVO_I2C_RESET (1 << 8)
#define AVIVO_DC_I2C_STATUS1 0x7d30
# define AVIVO_DC_I2C_DONE (1 << 0)
# define AVIVO_DC_I2C_NACK (1 << 1)
# define AVIVO_DC_I2C_HALT (1 << 2)
# define AVIVO_DC_I2C_GO (1 << 3)
#define AVIVO_DC_I2C_RESET 0x7d34
# define AVIVO_DC_I2C_SOFT_RESET (1 << 0)
# define AVIVO_DC_I2C_ABORT (1 << 8)
#define AVIVO_DC_I2C_CONTROL1 0x7d38
# define AVIVO_DC_I2C_START (1 << 0)
# define AVIVO_DC_I2C_STOP (1 << 1)
# define AVIVO_DC_I2C_RECEIVE (1 << 2)
# define AVIVO_DC_I2C_EN (1 << 8)
# define AVIVO_DC_I2C_PIN_SELECT(x) ((x) << 16)
# define AVIVO_SEL_DDC1 0
# define AVIVO_SEL_DDC2 1
# define AVIVO_SEL_DDC3 2
#define AVIVO_DC_I2C_CONTROL2 0x7d3c
# define AVIVO_DC_I2C_ADDR_COUNT(x) ((x) << 0)
# define AVIVO_DC_I2C_DATA_COUNT(x) ((x) << 8)
#define AVIVO_DC_I2C_CONTROL3 0x7d40
# define AVIVO_DC_I2C_DATA_DRIVE_EN (1 << 0)
# define AVIVO_DC_I2C_DATA_DRIVE_SEL (1 << 1)
# define AVIVO_DC_I2C_CLK_DRIVE_EN (1 << 7)
# define AVIVO_DC_I2C_RD_INTRA_BYTE_DELAY(x) ((x) << 8)
# define AVIVO_DC_I2C_WR_INTRA_BYTE_DELAY(x) ((x) << 16)
# define AVIVO_DC_I2C_TIME_LIMIT(x) ((x) << 24)
#define AVIVO_DC_I2C_DATA 0x7d44
#define AVIVO_DC_I2C_INTERRUPT_CONTROL 0x7d48
# define AVIVO_DC_I2C_INTERRUPT_STATUS (1 << 0)
# define AVIVO_DC_I2C_INTERRUPT_AK (1 << 8)
# define AVIVO_DC_I2C_INTERRUPT_ENABLE (1 << 16)
#define AVIVO_DC_I2C_ARBITRATION 0x7d50
# define AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C (1 << 0)
# define AVIVO_DC_I2C_SW_CAN_USE_I2C (1 << 1)
# define AVIVO_DC_I2C_SW_DONE_USING_I2C (1 << 8)
# define AVIVO_DC_I2C_HW_NEEDS_I2C (1 << 9)
# define AVIVO_DC_I2C_ABORT_HDCP_I2C (1 << 16)
# define AVIVO_DC_I2C_HW_USING_I2C (1 << 17)
#define AVIVO_DC_GPIO_DDC1_MASK 0x7e40
#define AVIVO_DC_GPIO_DDC1_A 0x7e44
#define AVIVO_DC_GPIO_DDC1_EN 0x7e48
#define AVIVO_DC_GPIO_DDC1_Y 0x7e4c
#define AVIVO_DC_GPIO_DDC2_MASK 0x7e50
#define AVIVO_DC_GPIO_DDC2_A 0x7e54
#define AVIVO_DC_GPIO_DDC2_EN 0x7e58
#define AVIVO_DC_GPIO_DDC2_Y 0x7e5c
#define AVIVO_DC_GPIO_DDC3_MASK 0x7e60
#define AVIVO_DC_GPIO_DDC3_A 0x7e64
#define AVIVO_DC_GPIO_DDC3_EN 0x7e68
#define AVIVO_DC_GPIO_DDC3_Y 0x7e6c
#define AVIVO_DISP_INTERRUPT_STATUS 0x7edc
# define AVIVO_D1_VBLANK_INTERRUPT (1 << 4)

1
drivers/gpu/drm/radeon/radeon.h
View file

@ -829,6 +829,7 @@ struct radeon_device {
struct r600_ih ih; /* r6/700 interrupt ring */
struct workqueue_struct *wq;
struct work_struct hotplug_work;
struct mutex dc_hw_i2c_mutex; /* display controller hw i2c mutex */
/* audio stuff */
struct timer_list audio_timer;

71
drivers/gpu/drm/radeon/radeon_combios.c
View file

@ -486,9 +486,65 @@ static struct radeon_i2c_bus_rec combios_setup_i2c_bus(struct radeon_device *rde
i2c.y_data_reg = ddc_line;
}
if (rdev->family < CHIP_R200)
i2c.hw_capable = false;
else {
switch (rdev->family) {
case CHIP_R100:
case CHIP_RV100:
case CHIP_RS100:
case CHIP_RV200:
case CHIP_RS200:
case CHIP_RS300:
switch (ddc_line) {
case RADEON_GPIO_DVI_DDC:
/* in theory this should be hw capable,
* but it doesn't seem to work
*/
i2c.hw_capable = false;
break;
default:
i2c.hw_capable = false;
break;
}
break;
case CHIP_R200:
switch (ddc_line) {
case RADEON_GPIO_DVI_DDC:
case RADEON_GPIO_MONID:
i2c.hw_capable = true;
break;
default:
i2c.hw_capable = false;
break;
}
break;
case CHIP_RV250:
case CHIP_RV280:
switch (ddc_line) {
case RADEON_GPIO_VGA_DDC:
case RADEON_GPIO_DVI_DDC:
case RADEON_GPIO_CRT2_DDC:
i2c.hw_capable = true;
break;
default:
i2c.hw_capable = false;
break;
}
break;
case CHIP_R300:
case CHIP_R350:
switch (ddc_line) {
case RADEON_GPIO_VGA_DDC:
case RADEON_GPIO_DVI_DDC:
i2c.hw_capable = true;
break;
default:
i2c.hw_capable = false;
break;
}
break;
case CHIP_RV350:
case CHIP_RV380:
case CHIP_RS400:
case CHIP_RS480:
switch (ddc_line) {
case RADEON_GPIO_VGA_DDC:
case RADEON_GPIO_DVI_DDC:
@ -504,6 +560,10 @@ static struct radeon_i2c_bus_rec combios_setup_i2c_bus(struct radeon_device *rde
i2c.hw_capable = false;
break;
}
break;
default:
i2c.hw_capable = false;
break;
}
i2c.mm_i2c = false;
i2c.i2c_id = 0;
@ -1253,7 +1313,10 @@ bool radeon_legacy_get_ext_tmds_info_from_combios(struct radeon_encoder *encoder
tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
break;
case DDC_LCD: /* MM i2c */
DRM_ERROR("MM i2c requires hw i2c engine\n");
i2c_bus.valid = true;
i2c_bus.hw_capable = true;
i2c_bus.mm_i2c = true;
tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
break;
default:
DRM_ERROR("Unsupported gpio %d\n", gpio);

1
drivers/gpu/drm/radeon/radeon_device.c
View file

@ -638,6 +638,7 @@ int radeon_device_init(struct radeon_device *rdev,
mutex_init(&rdev->cs_mutex);
mutex_init(&rdev->ib_pool.mutex);
mutex_init(&rdev->cp.mutex);
mutex_init(&rdev->dc_hw_i2c_mutex);
if (rdev->family >= CHIP_R600)
spin_lock_init(&rdev->ih.lock);
mutex_init(&rdev->gem.mutex);

597
drivers/gpu/drm/radeon/radeon_i2c.c
View file

@ -26,6 +26,7 @@
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon.h"
#include "atom.h"
/**
* radeon_ddc_probe
@ -71,13 +72,25 @@ static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
*/
if (rec->hw_capable) {
if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
if (rec->a_clk_reg == RADEON_GPIO_MONID) {
u32 reg;
if (rdev->family >= CHIP_RV350)
reg = RADEON_GPIO_MONID;
else if ((rdev->family == CHIP_R300) ||
(rdev->family == CHIP_R350))
reg = RADEON_GPIO_DVI_DDC;
else
reg = RADEON_GPIO_CRT2_DDC;
mutex_lock(&rdev->dc_hw_i2c_mutex);
if (rec->a_clk_reg == reg) {
WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
} else {
WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
}
mutex_unlock(&rdev->dc_hw_i2c_mutex);
}
}
@ -168,22 +181,584 @@ static void set_data(void *i2c_priv, int data)
WREG32(rec->en_data_reg, val);
}
static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
/* hw i2c engine for r1xx-4xx hardware
* hw can buffer up to 15 bytes
*/
static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
struct i2c_msg *p;
int i, j, k, ret = num;
/* XXX: use get_engine_clock() to get the current sclk */
u32 prescale = (((rdev->clock.default_sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
u32 i2c_cntl_0, i2c_cntl_1, i2c_data;
u32 tmp, reg;
mutex_lock(&rdev->dc_hw_i2c_mutex);
reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) |
RADEON_I2C_START |
RADEON_I2C_STOP |
RADEON_I2C_GO);
if (rdev->is_atom_bios) {
tmp = RREG32(RADEON_BIOS_6_SCRATCH);
WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
}
if (rec->mm_i2c) {
i2c_cntl_0 = RADEON_I2C_CNTL_0;
i2c_cntl_1 = RADEON_I2C_CNTL_1;
i2c_data = RADEON_I2C_DATA;
} else {
i2c_cntl_0 = RADEON_DVI_I2C_CNTL_0;
i2c_cntl_1 = RADEON_DVI_I2C_CNTL_1;
i2c_data = RADEON_DVI_I2C_DATA;
switch (rdev->family) {
case CHIP_R100:
case CHIP_RV100:
case CHIP_RS100:
case CHIP_RV200:
case CHIP_RS200:
case CHIP_RS300:
switch (rec->mask_clk_reg) {
case RADEON_GPIO_DVI_DDC:
/* no gpio select bit */
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
break;
case CHIP_R200:
/* only bit 4 on r200 */
switch (rec->mask_clk_reg) {
case RADEON_GPIO_DVI_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
break;
case RADEON_GPIO_MONID:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
break;
case CHIP_RV250:
case CHIP_RV280:
/* bits 3 and 4 */
switch (rec->mask_clk_reg) {
case RADEON_GPIO_DVI_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
break;
case RADEON_GPIO_VGA_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
break;
case RADEON_GPIO_CRT2_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
break;
case CHIP_R300:
case CHIP_R350:
/* only bit 4 on r300/r350 */
switch (rec->mask_clk_reg) {
case RADEON_GPIO_VGA_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
break;
case RADEON_GPIO_DVI_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
break;
case CHIP_RV350:
case CHIP_RV380:
case CHIP_R420:
case CHIP_R423:
case CHIP_RV410:
case CHIP_RS400:
case CHIP_RS480:
/* bits 3 and 4 */
switch (rec->mask_clk_reg) {
case RADEON_GPIO_VGA_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
break;
case RADEON_GPIO_DVI_DDC:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
break;
case RADEON_GPIO_MONID:
reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
break;
default:
DRM_ERROR("unsupported asic\n");
ret = -EINVAL;
goto done;
break;
}
}
/* check for bus probe */
p = &msgs[0];
if ((num == 1) && (p->len == 0)) {
WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
RADEON_I2C_NACK |
RADEON_I2C_HALT |
RADEON_I2C_SOFT_RST));
WREG32(i2c_data, (p->addr << 1) & 0xff);
WREG32(i2c_data, 0);
WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
(1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
RADEON_I2C_EN |
(48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
WREG32(i2c_cntl_0, reg);
for (k = 0; k < 32; k++) {
udelay(10);
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_GO)
continue;
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_DONE)
break;
else {
DRM_DEBUG("i2c write error 0x%08x\n", tmp);
WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
ret = -EIO;
goto done;
}
}
goto done;
}
for (i = 0; i < num; i++) {
p = &msgs[i];
for (j = 0; j < p->len; j++) {
if (p->flags & I2C_M_RD) {
WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
RADEON_I2C_NACK |
RADEON_I2C_HALT |
RADEON_I2C_SOFT_RST));
WREG32(i2c_data, ((p->addr << 1) & 0xff) | 0x1);
WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
(1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
RADEON_I2C_EN |
(48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
WREG32(i2c_cntl_0, reg | RADEON_I2C_RECEIVE);
for (k = 0; k < 32; k++) {
udelay(10);
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_GO)
continue;
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_DONE)
break;
else {
DRM_DEBUG("i2c read error 0x%08x\n", tmp);
WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
ret = -EIO;
goto done;
}
}
p->buf[j] = RREG32(i2c_data) & 0xff;
} else {
WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
RADEON_I2C_NACK |
RADEON_I2C_HALT |
RADEON_I2C_SOFT_RST));
WREG32(i2c_data, (p->addr << 1) & 0xff);
WREG32(i2c_data, p->buf[j]);
WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
(1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
RADEON_I2C_EN |
(48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
WREG32(i2c_cntl_0, reg);
for (k = 0; k < 32; k++) {
udelay(10);
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_GO)
continue;
tmp = RREG32(i2c_cntl_0);
if (tmp & RADEON_I2C_DONE)
break;
else {
DRM_DEBUG("i2c write error 0x%08x\n", tmp);
WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
ret = -EIO;
goto done;
}
}
}
}
}
done:
WREG32(i2c_cntl_0, 0);
WREG32(i2c_cntl_1, 0);
WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
RADEON_I2C_NACK |
RADEON_I2C_HALT |
RADEON_I2C_SOFT_RST));
if (rdev->is_atom_bios) {
tmp = RREG32(RADEON_BIOS_6_SCRATCH);
tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
WREG32(RADEON_BIOS_6_SCRATCH, tmp);
}
mutex_unlock(&rdev->dc_hw_i2c_mutex);
return ret;
}
/* hw i2c engine for r5xx hardware
* hw can buffer up to 15 bytes
*/
static int r500_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
struct i2c_msg *p;
int i2c_clock = 50;
int i, j, remaining, current_count, buffer_offset, ret = num;
/* XXX: use get_engine_clock() to get the current sclk */
u32 prescale;
u32 tmp, reg;
u32 saved1, saved2;
mutex_lock(&rdev->dc_hw_i2c_mutex);
/* clear gpio mask bits */
tmp = RREG32(rec->mask_clk_reg);
tmp &= ~rec->mask_clk_mask;
WREG32(rec->mask_clk_reg, tmp);
tmp = RREG32(rec->mask_clk_reg);
tmp = RREG32(rec->mask_data_reg);
tmp &= ~rec->mask_data_mask;
WREG32(rec->mask_data_reg, tmp);
tmp = RREG32(rec->mask_data_reg);
/* clear pin values */
tmp = RREG32(rec->a_clk_reg);
tmp &= ~rec->a_clk_mask;
WREG32(rec->a_clk_reg, tmp);
tmp = RREG32(rec->a_clk_reg);
tmp = RREG32(rec->a_data_reg);
tmp &= ~rec->a_data_mask;
WREG32(rec->a_data_reg, tmp);
tmp = RREG32(rec->a_data_reg);
/* set the pins to input */
tmp = RREG32(rec->en_clk_reg);
tmp &= ~rec->en_clk_mask;
WREG32(rec->en_clk_reg, tmp);
tmp = RREG32(rec->en_clk_reg);
tmp = RREG32(rec->en_data_reg);
tmp &= ~rec->en_data_mask;
WREG32(rec->en_data_reg, tmp);
tmp = RREG32(rec->en_data_reg);
/* */
tmp = RREG32(RADEON_BIOS_6_SCRATCH);
WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
saved1 = RREG32(AVIVO_DC_I2C_CONTROL1);
saved2 = RREG32(0x494);
WREG32(0x494, saved2 | 0x1);
WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C);
for (i = 0; i < 50; i++) {
udelay(1);
if (RREG32(AVIVO_DC_I2C_ARBITRATION) & AVIVO_DC_I2C_SW_CAN_USE_I2C)
break;
}
if (i == 50) {
DRM_ERROR("failed to get i2c bus\n");
ret = -EBUSY;
goto done;
}
if (rdev->family == CHIP_R520)
prescale = (127 << 8) + ((rdev->clock.default_sclk * 10) / (4 * 127 * i2c_clock));
else
prescale = (((rdev->clock.default_sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
reg = AVIVO_DC_I2C_START | AVIVO_DC_I2C_STOP | AVIVO_DC_I2C_EN;
switch (rec->mask_clk_reg) {
case AVIVO_DC_GPIO_DDC1_MASK:
reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1);
break;
case AVIVO_DC_GPIO_DDC2_MASK:
reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2);
break;
case AVIVO_DC_GPIO_DDC3_MASK:
reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3);
break;
default:
DRM_ERROR("gpio not supported with hw i2c\n");
ret = -EINVAL;
goto done;
}
/* check for bus probe */
p = &msgs[0];
if ((num == 1) && (p->len == 0)) {
WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
AVIVO_DC_I2C_NACK |
AVIVO_DC_I2C_HALT));
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
udelay(1);
WREG32(AVIVO_DC_I2C_RESET, 0);
WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
WREG32(AVIVO_DC_I2C_DATA, 0);
WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
AVIVO_DC_I2C_DATA_COUNT(1) |
(prescale << 16)));
WREG32(AVIVO_DC_I2C_CONTROL1, reg);
WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
for (j = 0; j < 200; j++) {
udelay(50);
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_GO)
continue;
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_DONE)
break;
else {
DRM_DEBUG("i2c write error 0x%08x\n", tmp);
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
ret = -EIO;
goto done;
}
}
goto done;
}
for (i = 0; i < num; i++) {
p = &msgs[i];
remaining = p->len;
buffer_offset = 0;
if (p->flags & I2C_M_RD) {
while (remaining) {
if (remaining > 15)
current_count = 15;
else
current_count = remaining;
WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
AVIVO_DC_I2C_NACK |
AVIVO_DC_I2C_HALT));
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
udelay(1);
WREG32(AVIVO_DC_I2C_RESET, 0);
WREG32(AVIVO_DC_I2C_DATA, ((p->addr << 1) & 0xff) | 0x1);
WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
AVIVO_DC_I2C_DATA_COUNT(current_count) |
(prescale << 16)));
WREG32(AVIVO_DC_I2C_CONTROL1, reg | AVIVO_DC_I2C_RECEIVE);
WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
for (j = 0; j < 200; j++) {
udelay(50);
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_GO)
continue;
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_DONE)
break;
else {
DRM_DEBUG("i2c read error 0x%08x\n", tmp);
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
ret = -EIO;
goto done;
}
}
for (j = 0; j < current_count; j++)
p->buf[buffer_offset + j] = RREG32(AVIVO_DC_I2C_DATA) & 0xff;
remaining -= current_count;
buffer_offset += current_count;
}
} else {
while (remaining) {
if (remaining > 15)
current_count = 15;
else
current_count = remaining;
WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
AVIVO_DC_I2C_NACK |
AVIVO_DC_I2C_HALT));
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
udelay(1);
WREG32(AVIVO_DC_I2C_RESET, 0);
WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
for (j = 0; j < current_count; j++)
WREG32(AVIVO_DC_I2C_DATA, p->buf[buffer_offset + j]);
WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
AVIVO_DC_I2C_DATA_COUNT(current_count) |
(prescale << 16)));
WREG32(AVIVO_DC_I2C_CONTROL1, reg);
WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
for (j = 0; j < 200; j++) {
udelay(50);
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_GO)
continue;
tmp = RREG32(AVIVO_DC_I2C_STATUS1);
if (tmp & AVIVO_DC_I2C_DONE)
break;
else {
DRM_DEBUG("i2c write error 0x%08x\n", tmp);
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
ret = -EIO;
goto done;
}
}
remaining -= current_count;
buffer_offset += current_count;
}
}
}
done:
WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
AVIVO_DC_I2C_NACK |
AVIVO_DC_I2C_HALT));
WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
udelay(1);
WREG32(AVIVO_DC_I2C_RESET, 0);
WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_DONE_USING_I2C);
WREG32(AVIVO_DC_I2C_CONTROL1, saved1);
WREG32(0x494, saved2);
tmp = RREG32(RADEON_BIOS_6_SCRATCH);
tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
WREG32(RADEON_BIOS_6_SCRATCH, tmp);
mutex_unlock(&rdev->dc_hw_i2c_mutex);
return ret;
}
static int radeon_sw_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
int ret;
radeon_i2c_do_lock(i2c, 1);
if (i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num) == num)
ret = num;
else
ret = -1;
ret = i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num);
radeon_i2c_do_lock(i2c, 0);
return ret;
}
static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg *msgs, int num)
{
struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
int ret;
switch (rdev->family) {
case CHIP_R100:
case CHIP_RV100:
case CHIP_RS100:
case CHIP_RV200:
case CHIP_RS200:
case CHIP_R200:
case CHIP_RV250:
case CHIP_RS300:
case CHIP_RV280:
case CHIP_R300:
case CHIP_R350:
case CHIP_RV350:
case CHIP_RV380:
case CHIP_R420:
case CHIP_R423:
case CHIP_RV410:
case CHIP_RS400:
case CHIP_RS480:
if (rec->hw_capable)
ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
else
ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num);
break;
case CHIP_RS600:
case CHIP_RS690:
case CHIP_RS740:
/* XXX fill in hw i2c implementation */
ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num);
break;
case CHIP_RV515:
case CHIP_R520:
case CHIP_RV530:
case CHIP_RV560:
case CHIP_RV570:
case CHIP_R580:
if (rec->hw_capable) {
if (rec->mm_i2c)
ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
else
ret = r500_hw_i2c_xfer(i2c_adap, msgs, num);
} else
ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num);
break;
case CHIP_R600:
case CHIP_RV610:
case CHIP_RV630:
case CHIP_RV670:
/* XXX fill in hw i2c implementation */
ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num);
break;
case CHIP_RV620:
case CHIP_RV635:
case CHIP_RS780:
case CHIP_RS880:
case CHIP_RV770:
case CHIP_RV730:
case CHIP_RV710:
case CHIP_RV740:
/* XXX fill in hw i2c implementation */
ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num);
break;
default:
DRM_ERROR("i2c: unhandled radeon chip\n");
ret = -EIO;
break;
}
return ret;
}
static u32 radeon_i2c_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
@ -205,8 +780,6 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
if (i2c == NULL)
return NULL;
i2c->dev = dev;
i2c->rec = *rec;
/* set the internal bit adapter */
i2c->algo.radeon.bit_adapter.owner = THIS_MODULE;
i2c_set_adapdata(&i2c->algo.radeon.bit_adapter, i2c);
@ -223,10 +796,12 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
i2c->algo.radeon.bit_data.data = i2c;
ret = i2c_bit_add_bus(&i2c->algo.radeon.bit_adapter);
if (ret) {
DRM_INFO("Failed to register internal bit i2c %s\n", name);
DRM_ERROR("Failed to register internal bit i2c %s\n", name);
goto out_free;
}
/* set the radeon i2c adapter */
i2c->dev = dev;
i2c->rec = *rec;
i2c->adapter.owner = THIS_MODULE;
i2c_set_adapdata(&i2c->adapter, i2c);
sprintf(i2c->adapter.name, "Radeon i2c %s", name);
@ -234,7 +809,7 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
i2c->adapter.algo = &radeon_i2c_algo;
ret = i2c_add_adapter(&i2c->adapter);
if (ret) {
DRM_INFO("Failed to register i2c %s\n", name);
DRM_ERROR("Failed to register i2c %s\n", name);
goto out_free;
}

48
drivers/gpu/drm/radeon/radeon_reg.h
View file

@ -1060,32 +1060,38 @@
/* Multimedia I2C bus */
#define RADEON_I2C_CNTL_0 0x0090
#define RADEON_I2C_DONE (1 << 0)
#define RADEON_I2C_NACK (1 << 1)
#define RADEON_I2C_HALT (1 << 2)
#define RADEON_I2C_SOFT_RST (1 << 5)
#define RADEON_I2C_DRIVE_EN (1 << 6)
#define RADEON_I2C_DRIVE_SEL (1 << 7)
#define RADEON_I2C_START (1 << 8)
#define RADEON_I2C_STOP (1 << 9)
#define RADEON_I2C_RECEIVE (1 << 10)
#define RADEON_I2C_ABORT (1 << 11)
#define RADEON_I2C_GO (1 << 12)
#define RADEON_I2C_PRESCALE_SHIFT 16
# define RADEON_I2C_DONE (1 << 0)
# define RADEON_I2C_NACK (1 << 1)
# define RADEON_I2C_HALT (1 << 2)
# define RADEON_I2C_SOFT_RST (1 << 5)
# define RADEON_I2C_DRIVE_EN (1 << 6)
# define RADEON_I2C_DRIVE_SEL (1 << 7)
# define RADEON_I2C_START (1 << 8)
# define RADEON_I2C_STOP (1 << 9)
# define RADEON_I2C_RECEIVE (1 << 10)
# define RADEON_I2C_ABORT (1 << 11)
# define RADEON_I2C_GO (1 << 12)
# define RADEON_I2C_PRESCALE_SHIFT 16
#define RADEON_I2C_CNTL_1 0x0094
#define RADEON_I2C_DATA_COUNT_SHIFT 0
#define RADEON_I2C_ADDR_COUNT_SHIFT 4
#define RADEON_I2C_INTRA_BYTE_DELAY_SHIFT 8
#define RADEON_I2C_SEL (1 << 16)
#define RADEON_I2C_EN (1 << 17)
#define RADEON_I2C_TIME_LIMIT_SHIFT 24
# define RADEON_I2C_DATA_COUNT_SHIFT 0
# define RADEON_I2C_ADDR_COUNT_SHIFT 4
# define RADEON_I2C_INTRA_BYTE_DELAY_SHIFT 8
# define RADEON_I2C_SEL (1 << 16)
# define RADEON_I2C_EN (1 << 17)
# define RADEON_I2C_TIME_LIMIT_SHIFT 24
#define RADEON_I2C_DATA 0x0098
#define RADEON_DVI_I2C_CNTL_0 0x02e0
# define R200_DVI_I2C_PIN_SEL(x) ((x) << 3)
# define R200_SEL_DDC1 0 /* 0x60 - VGA_DDC */
# define R200_SEL_DDC2 1 /* 0x64 - DVI_DDC */
# define R200_SEL_DDC3 2 /* 0x68 - MONID_DDC */
# define R200_SEL_DDC1 0 /* depends on asic */
# define R200_SEL_DDC2 1 /* depends on asic */
# define R200_SEL_DDC3 2 /* depends on asic */
# define RADEON_SW_WANTS_TO_USE_DVI_I2C (1 << 13)
# define RADEON_SW_CAN_USE_DVI_I2C (1 << 13)
# define RADEON_SW_DONE_USING_DVI_I2C (1 << 14)
# define RADEON_HW_NEEDS_DVI_I2C (1 << 14)
# define RADEON_ABORT_HW_DVI_I2C (1 << 15)
# define RADEON_HW_USING_DVI_I2C (1 << 15)
#define RADEON_DVI_I2C_CNTL_1 0x02e4
#define RADEON_DVI_I2C_DATA 0x02e8