[ARM] Remove EEPROM slave emulation from i2c-pxa driver.
The i2c-pxa driver should not contain EEPROM slave-mode emulation; this is something the platform should provide where required. Remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
Russell King
parent
df58d03595
commit
beea494d5e
2 changed files with 1 additions and 161 deletions
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@ -357,133 +357,6 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
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#ifdef CONFIG_I2C_PXA_SLAVE
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/*
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* I2C EEPROM emulation.
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*/
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static struct i2c_eeprom_emu eeprom = {
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.size = I2C_EEPROM_EMU_SIZE,
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.watch = LIST_HEAD_INIT(eeprom.watch),
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};
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struct i2c_eeprom_emu *i2c_pxa_get_eeprom(void)
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{
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return &eeprom;
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}
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int i2c_eeprom_emu_addwatcher(struct i2c_eeprom_emu *emu, void *data,
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unsigned int addr, unsigned int size,
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struct i2c_eeprom_emu_watcher *watcher)
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{
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struct i2c_eeprom_emu_watch *watch;
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unsigned long flags;
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if (addr + size > emu->size)
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return -EINVAL;
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watch = kmalloc(sizeof(struct i2c_eeprom_emu_watch), GFP_KERNEL);
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if (watch) {
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watch->start = addr;
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watch->end = addr + size - 1;
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watch->ops = watcher;
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watch->data = data;
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local_irq_save(flags);
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list_add(&watch->node, &emu->watch);
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local_irq_restore(flags);
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}
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return watch ? 0 : -ENOMEM;
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}
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void i2c_eeprom_emu_delwatcher(struct i2c_eeprom_emu *emu, void *data,
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struct i2c_eeprom_emu_watcher *watcher)
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{
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struct i2c_eeprom_emu_watch *watch, *n;
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unsigned long flags;
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list_for_each_entry_safe(watch, n, &emu->watch, node) {
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if (watch->ops == watcher && watch->data == data) {
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local_irq_save(flags);
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list_del(&watch->node);
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local_irq_restore(flags);
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kfree(watch);
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}
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}
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}
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static void i2c_eeprom_emu_event(void *ptr, i2c_slave_event_t event)
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{
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struct i2c_eeprom_emu *emu = ptr;
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eedbg(3, "i2c_eeprom_emu_event: %d\n", event);
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switch (event) {
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case I2C_SLAVE_EVENT_START_WRITE:
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emu->seen_start = 1;
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eedbg(2, "i2c_eeprom: write initiated\n");
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break;
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case I2C_SLAVE_EVENT_START_READ:
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emu->seen_start = 0;
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eedbg(2, "i2c_eeprom: read initiated\n");
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break;
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case I2C_SLAVE_EVENT_STOP:
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emu->seen_start = 0;
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eedbg(2, "i2c_eeprom: received stop\n");
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break;
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default:
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eedbg(0, "i2c_eeprom: unhandled event\n");
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break;
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}
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}
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static int i2c_eeprom_emu_read(void *ptr)
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{
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struct i2c_eeprom_emu *emu = ptr;
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int ret;
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ret = emu->bytes[emu->ptr];
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emu->ptr = (emu->ptr + 1) % emu->size;
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return ret;
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}
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static void i2c_eeprom_emu_write(void *ptr, unsigned int val)
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{
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struct i2c_eeprom_emu *emu = ptr;
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struct i2c_eeprom_emu_watch *watch;
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if (emu->seen_start != 0) {
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eedbg(2, "i2c_eeprom_emu_write: setting ptr %02x\n", val);
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emu->ptr = val;
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emu->seen_start = 0;
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return;
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}
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emu->bytes[emu->ptr] = val;
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eedbg(1, "i2c_eeprom_emu_write: ptr=0x%02x, val=0x%02x\n",
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emu->ptr, val);
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list_for_each_entry(watch, &emu->watch, node) {
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if (!watch->ops || !watch->ops->write)
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continue;
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if (watch->start <= emu->ptr && watch->end >= emu->ptr)
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watch->ops->write(watch->data, emu->ptr, val);
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}
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emu->ptr = (emu->ptr + 1) % emu->size;
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}
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struct i2c_slave_client eeprom_client = {
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.data = &eeprom,
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.event = i2c_eeprom_emu_event,
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.read = i2c_eeprom_emu_read,
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.write = i2c_eeprom_emu_write
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};
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/*
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* PXA I2C Slave mode
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*/
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@ -963,11 +836,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
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i2c->slave_addr = I2C_PXA_SLAVE_ADDR;
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#ifdef CONFIG_I2C_PXA_SLAVE
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i2c->slave = &eeprom_client;
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if (plat) {
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i2c->slave_addr = plat->slave_addr;
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if (plat->slave)
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i2c->slave = plat->slave;
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i2c->slave = plat->slave;
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}
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#endif
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@ -1,29 +1,6 @@
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#ifndef _LINUX_I2C_ALGO_PXA_H
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#define _LINUX_I2C_ALGO_PXA_H
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struct i2c_eeprom_emu_watcher {
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void (*write)(void *, unsigned int addr, unsigned char newval);
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};
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struct i2c_eeprom_emu_watch {
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struct list_head node;
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unsigned int start;
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unsigned int end;
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struct i2c_eeprom_emu_watcher *ops;
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void *data;
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};
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#define I2C_EEPROM_EMU_SIZE (256)
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struct i2c_eeprom_emu {
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unsigned int size;
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unsigned int ptr;
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unsigned int seen_start;
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struct list_head watch;
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unsigned char bytes[I2C_EEPROM_EMU_SIZE];
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};
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typedef enum i2c_slave_event_e {
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I2C_SLAVE_EVENT_START_READ,
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I2C_SLAVE_EVENT_START_WRITE,
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@ -37,12 +14,4 @@ struct i2c_slave_client {
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void (*write)(void *ptr, unsigned int val);
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};
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extern int i2c_eeprom_emu_addwatcher(struct i2c_eeprom_emu *, void *data,
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unsigned int addr, unsigned int size,
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struct i2c_eeprom_emu_watcher *);
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extern void i2c_eeprom_emu_delwatcher(struct i2c_eeprom_emu *, void *data, struct i2c_eeprom_emu_watcher *watcher);
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extern struct i2c_eeprom_emu *i2c_pxa_get_eeprom(void);
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#endif /* _LINUX_I2C_ALGO_PXA_H */
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