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[s3c24xx] glamo-mci: Cleanup mmc clock rate control.

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16936 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
lars
2009-07-20 22:55:14 +00:00
parent fae902def7
commit 3bbf9530b1
5 changed files with 327 additions and 411 deletions
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100
target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-core.c
View File

@@ -76,6 +76,7 @@ struct reg_range {
char *name;
char dump;
};
struct reg_range reg_range[] = {
{ 0x0000, 0x76, "General", 1 },
{ 0x0200, 0x18, "Host Bus", 1 },
@@ -86,7 +87,7 @@ struct reg_range reg_range[] = {
/* { 0x0c00, 0xcc, "MPEG", 0 }, */
{ 0x1100, 0xb2, "LCD 1", 1 },
{ 0x1200, 0x64, "LCD 2", 1 },
{ 0x1400, 0x40, "MMC", 1 },
{ 0x1400, 0x42, "MMC", 1 },
/* { 0x1500, 0x080, "MPU 0", 0 },
{ 0x1580, 0x080, "MPU 1", 0 },
{ 0x1600, 0x080, "Cmd Queue", 0 },
@@ -544,7 +545,40 @@ u_int16_t glamo_engine_clkreg_get(struct glamo_core *glamo,
}
EXPORT_SYMBOL_GPL(glamo_engine_clkreg_get);
struct glamo_script reset_regs[] = {
static const struct glamo_script engine_div_regs[__NUM_GLAMO_ENGINES] = {
[GLAMO_ENGINE_LCD] = {GLAMO_REG_CLOCK_GEN5_1, GLAMO_CLOCK_GEN51_EN_DIV_DCLK},
[GLAMO_ENGINE_MMC] = {GLAMO_REG_CLOCK_GEN5_1, GLAMO_CLOCK_GEN51_EN_DIV_TCLK},
[GLAMO_ENGINE_2D] = {GLAMO_REG_CLOCK_GEN5_1, GLAMO_CLOCK_GEN51_EN_DIV_GCLK},
};
void glamo_engine_div_enable(struct glamo_core *glamo, enum glamo_engine engine)
{
uint16_t reg = engine_div_regs[engine].reg;
uint16_t bit = engine_div_regs[engine].val;
uint16_t val;
spin_lock(&glamo->lock);
val = __reg_read(glamo, reg);
__reg_write(glamo, reg, val | bit);
spin_unlock(&glamo->lock);
mdelay(5);
}
EXPORT_SYMBOL_GPL(glamo_engine_div_enable);
void glamo_engine_div_disable(struct glamo_core *glamo, enum glamo_engine engine)
{
uint16_t reg = engine_div_regs[engine].reg;
uint16_t bit = engine_div_regs[engine].val;
uint16_t val;
spin_lock(&glamo->lock);
val = __reg_read(glamo, reg);
__reg_write(glamo, reg, val & ~bit);
spin_unlock(&glamo->lock);
}
EXPORT_SYMBOL_GPL(glamo_engine_div_disable);
static const struct glamo_script reset_regs[] = {
[GLAMO_ENGINE_LCD] = {
GLAMO_REG_CLOCK_LCD, GLAMO_CLOCK_LCD_RESET
},
@@ -572,18 +606,18 @@ struct glamo_script reset_regs[] = {
void glamo_engine_reset(struct glamo_core *glamo, enum glamo_engine engine)
{
struct glamo_script *rst;
uint16_t reg = reset_regs[engine].reg;
uint16_t val = reset_regs[engine].val;
if (engine >= ARRAY_SIZE(reset_regs)) {
dev_warn(&glamo->pdev->dev, "unknown engine %u ", engine);
return;
}
rst = &reset_regs[engine];
spin_lock(&glamo->lock);
__reg_set_bit(glamo, rst->reg, rst->val);
__reg_clear_bit(glamo, rst->reg, rst->val);
__reg_set_bit(glamo, reg, val);
__reg_clear_bit(glamo, reg, val);
spin_unlock(&glamo->lock);
}
EXPORT_SYMBOL_GPL(glamo_engine_reset);
@@ -599,21 +633,12 @@ void glamo_lcm_reset(struct platform_device *pdev, int level)
}
EXPORT_SYMBOL_GPL(glamo_lcm_reset);
enum glamo_pll {
GLAMO_PLL1,
GLAMO_PLL2,
};
static int glamo_pll_rate(struct glamo_core *glamo,
int glamo_pll_rate(struct glamo_core *glamo,
enum glamo_pll pll)
{
u_int16_t reg;
unsigned int div = 512;
unsigned int osci = glamo->pdata->osci_clock_rate;
if (osci == 32768)
div = 1;
switch (pll) {
case GLAMO_PLL1:
reg = __reg_read(glamo, GLAMO_REG_PLL_GEN1);
@@ -624,18 +649,19 @@ static int glamo_pll_rate(struct glamo_core *glamo,
default:
return -EINVAL;
}
return (osci/div)*reg;
return osci*reg;
}
EXPORT_SYMBOL_GPL(glamo_pll_rate);
int glamo_engine_reclock(struct glamo_core *glamo,
enum glamo_engine engine,
int ps)
int hz)
{
int pll, khz;
u_int16_t reg, mask, val = 0;
int pll;
u_int16_t reg, mask, div;
if (!ps)
return 0;
if (!hz)
return -EINVAL;
switch (engine) {
case GLAMO_ENGINE_LCD:
@@ -643,6 +669,11 @@ int glamo_engine_reclock(struct glamo_core *glamo,
reg = GLAMO_REG_CLOCK_GEN7;
mask = 0xff;
break;
case GLAMO_ENGINE_MMC:
pll = GLAMO_PLL1;
reg = GLAMO_REG_CLOCK_GEN8;
mask = 0xff;
break;
default:
dev_warn(&glamo->pdev->dev,
"reclock of engine 0x%x not supported\n", engine);
@@ -651,23 +682,22 @@ int glamo_engine_reclock(struct glamo_core *glamo,
}
pll = glamo_pll_rate(glamo, pll);
khz = 1000000000UL / ps;
if (khz)
val = (pll / khz) / 1000;
div = pll / hz;
if (div != 0 && pll / div <= hz)
--div;
if (div > mask)
div = mask;
dev_dbg(&glamo->pdev->dev,
"PLL %d, kHZ %d, div %d\n", pll, khz, val);
"PLL %d, kHZ %d, div %d\n", pll, hz / 1000, div);
if (val) {
val--;
reg_set_bit_mask(glamo, reg, mask, val);
reg_set_bit_mask(glamo, reg, mask, div);
mdelay(5); /* wait some time to stabilize */
return 0;
} else {
return -EINVAL;
}
return pll / (div + 1);
}
EXPORT_SYMBOL_GPL(glamo_engine_reclock);
@@ -675,7 +705,7 @@ EXPORT_SYMBOL_GPL(glamo_engine_reclock);
* script support
***********************************************************************/
int glamo_run_script(struct glamo_core *glamo, struct glamo_script *script,
int glamo_run_script(struct glamo_core *glamo, const struct glamo_script *script,
int len, int may_sleep)
{
int i;
@@ -746,7 +776,7 @@ int glamo_run_script(struct glamo_core *glamo, struct glamo_script *script,
}
EXPORT_SYMBOL(glamo_run_script);
static struct glamo_script glamo_init_script[] = {
static const struct glamo_script glamo_init_script[] = {
{ GLAMO_REG_CLOCK_HOST, 0x1000 },
{ 0xfffe, 2 },
{ GLAMO_REG_CLOCK_MEMORY, 0x1000 },

13
target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-core.h
View File

@@ -17,6 +17,11 @@
#define GLAMO_MMC_BUFFER_SIZE (64 * 1024)
#define GLAMO_FB_SIZE (GLAMO_INTERNAL_RAM_SIZE - GLAMO_MMC_BUFFER_SIZE)
enum glamo_pll {
GLAMO_PLL1,
GLAMO_PLL2,
};
struct glamo_core {
int irq;
int irq_works; /* 0 means PCB does not support Glamo IRQ */
@@ -38,8 +43,14 @@ struct glamo_script {
u_int16_t val;
};
void glamo_engine_div_enable(struct glamo_core *glamo, enum glamo_engine engine);
void glamo_engine_div_disable(struct glamo_core *glamo, enum glamo_engine engine);
int glamo_pll_rate(struct glamo_core *glamo, enum glamo_pll pll);
int glamo_run_script(struct glamo_core *glamo,
struct glamo_script *script, int len, int may_sleep);
const struct glamo_script *script, int len, int may_sleep);
int glamo_engine_enable(struct glamo_core *glamo, enum glamo_engine engine);
int glamo_engine_disable(struct glamo_core *glamo, enum glamo_engine engine);

2
target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-fb.c
View File

@@ -321,7 +321,7 @@ static void glamofb_program_mode(struct glamofb_handle* gfb) {
if (var->pixclock)
glamo_engine_reclock(gcore,
GLAMO_ENGINE_LCD,
gfb->fb->var.pixclock);
(1000000000UL / gfb->fb->var.pixclock) * 1000);
reg_set_bit_mask(gfb,
GLAMO_REG_LCD_WIDTH,

536
target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.c
View File

@@ -23,15 +23,41 @@
#include <linux/crc7.h>
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/glamo.h>
#include "glamo-mci.h"
#include "glamo-core.h"
#include "glamo-regs.h"
#define DRIVER_NAME "glamo-mci"
static void glamo_mci_send_request(struct mmc_host *mmc);
struct glamo_mci_host {
struct platform_device *pdev;
struct glamo_mmc_platform_data *pdata;
struct mmc_host *mmc;
struct resource *mmio_mem;
struct resource *data_mem;
void __iomem *mmio_base;
u16 __iomem *data_base;
struct regulator *regulator;
struct mmc_request *mrq;
unsigned int clk_rate;
unsigned short vdd;
char power_mode;
unsigned char request_counter;
struct timer_list disable_timer;
struct work_struct irq_work;
unsigned clk_enabled : 1;
};
static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request* mrq);
static void glamo_mci_send_command(struct glamo_mci_host *host,
struct mmc_command *cmd);
@@ -48,7 +74,7 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
* for example
*/
static int sd_max_clk = 50000000 / 3;
static int sd_max_clk = 50000000;
module_param(sd_max_clk, int, 0644);
/*
@@ -85,35 +111,6 @@ static int sd_post_power_clock = 1000000;
module_param(sd_post_power_clock, int, 0644);
/*
* SD Signal drive strength
*
* you can override this on kernel commandline using
*
* glamo_mci.sd_drive=0
*
* for example
*/
static int sd_drive;
module_param(sd_drive, int, 0644);
/*
* SD allow SD clock to run while idle
*
* you can override this on kernel commandline using
*
* glamo_mci.sd_idleclk=0
*
* for example
*/
static int sd_idleclk = 0; /* disallow idle clock by default */
module_param(sd_idleclk, int, 0644);
/* used to stash real idleclk state in suspend: we force it to run in there */
static int suspend_sd_idleclk;
static inline void glamo_reg_write(struct glamo_mci_host *glamo,
u_int16_t reg, u_int16_t val)
{
@@ -140,11 +137,34 @@ static void glamo_reg_set_bit_mask(struct glamo_mci_host *glamo,
glamo_reg_write(glamo, reg, tmp);
}
static void do_pio_read(struct glamo_mci_host *host)
static void glamo_mci_clock_disable(struct glamo_mci_host *host) {
if (host->clk_enabled) {
/* glamo_engine_div_disable(host->pdata->core, GLAMO_ENGINE_MMC);*/
host->clk_enabled = 0;
printk("clk disabled\n");
}
}
static void glamo_mci_clock_enable(struct glamo_mci_host *host) {
del_timer_sync(&host->disable_timer);
if (!host->clk_enabled) {
glamo_engine_div_enable(host->pdata->core, GLAMO_ENGINE_MMC);
host->clk_enabled = 1;
printk("clk enabled\n");
}
}
static void glamo_mci_disable_timer(unsigned long data) {
struct glamo_mci_host *host = (struct glamo_mci_host *)data;
glamo_mci_clock_disable(host);
}
static void do_pio_read(struct glamo_mci_host *host, struct mmc_data *data)
{
struct scatterlist *sg;
u16 __iomem *from_ptr = host->data_base;
struct mmc_data *data = host->mrq->data;
void *sg_pointer;
dev_dbg(&host->pdev->dev, "pio_read():\n");
@@ -162,11 +182,10 @@ static void do_pio_read(struct glamo_mci_host *host)
"complete (no more data).\n");
}
static void do_pio_write(struct glamo_mci_host *host)
static void do_pio_write(struct glamo_mci_host *host, struct mmc_data *data)
{
struct scatterlist *sg;
u16 __iomem *to_ptr = host->data_base;
struct mmc_data *data = host->mrq->data;
void *sg_pointer;
dev_dbg(&host->pdev->dev, "pio_write():\n");
@@ -182,117 +201,41 @@ static void do_pio_write(struct glamo_mci_host *host)
dev_dbg(&host->pdev->dev, "pio_write(): complete\n");
}
static void glamo_mci_fix_card_div(struct glamo_mci_host *host, int div)
{
unsigned long flags;
spin_lock_irqsave(&host->pdata->core->lock, flags);
if (div < 0) {
/* stop clock - remove clock from divider input */
writew(readw(host->pdata->core->base +
GLAMO_REG_CLOCK_GEN5_1) & (~GLAMO_CLOCK_GEN51_EN_DIV_TCLK),
host->pdata->core->base + GLAMO_REG_CLOCK_GEN5_1);
} else {
if (host->force_slow_during_powerup)
div = host->clk_rate / sd_post_power_clock;
else if (host->pdata->glamo_mmc_use_slow &&
host->pdata->glamo_mmc_use_slow())
div = div * sd_slow_ratio;
if (div > 255)
div = 255;
/*
* set the nearest prescaler factor
*
* register shared with SCLK divisor -- no chance of race because
* we don't use sensor interface
*/
writew((readw(host->pdata->core->base +
GLAMO_REG_CLOCK_GEN8) & 0xff00) | div,
host->pdata->core->base + GLAMO_REG_CLOCK_GEN8);
/* enable clock to divider input */
writew(readw(host->pdata->core->base +
GLAMO_REG_CLOCK_GEN5_1) | GLAMO_CLOCK_GEN51_EN_DIV_TCLK,
host->pdata->core->base + GLAMO_REG_CLOCK_GEN5_1);
}
spin_unlock_irqrestore(&host->pdata->core->lock, flags);
mdelay(5);
}
static int glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq)
{
int div = 0;
int real_rate = 0;
if (freq) {
/* Set clock */
for (div = 0; div < 255; div++) {
real_rate = host->clk_rate / (div + 1);
if (real_rate <= freq)
break;
}
host->clk_div = div;
glamo_mci_fix_card_div(host, div);
glamo_mci_clock_enable(host);
real_rate = glamo_engine_reclock(host->pdata->core, GLAMO_ENGINE_MMC, freq);
} else {
/* stop clock */
host->clk_div = 0xff;
if (!sd_idleclk && !host->force_slow_during_powerup)
/* clock off */
glamo_mci_fix_card_div(host, -1);
glamo_mci_clock_disable(host);
}
host->real_rate = real_rate;
return real_rate;
}
static void glamo_mci_request_done(struct glamo_mci_host *host, struct
mmc_request *mrq) {
mod_timer(&host->disable_timer, jiffies + HZ / 16);
mmc_request_done(host->mmc, mrq);
}
static void glamo_mci_irq_worker(struct work_struct *work)
{
struct glamo_mci_host *host =
container_of(work, struct glamo_mci_host, irq_work);
struct mmc_command *cmd = host->mrq->cmd;
if (cmd->data->flags & MMC_DATA_READ) {
do_pio_read(host);
}
/* issue STOP if we have been given one to use */
if (host->mrq->stop) {
glamo_mci_send_command(host, host->mrq->stop);
}
if (!sd_idleclk && !host->force_slow_during_powerup)
/* clock off */
glamo_mci_fix_card_div(host, -1);
host->mrq = NULL;
mmc_request_done(host->mmc, cmd->mrq);
}
static irqreturn_t glamo_mci_irq(int irq, void *devid)
{
struct glamo_mci_host *host = (struct glamo_mci_host*)devid;
u16 status;
struct glamo_mci_host *host = container_of(work, struct glamo_mci_host,
irq_work);
struct mmc_command *cmd;
unsigned long flags;
uint16_t status;
if (host->suspending) { /* bad news, dangerous time */
dev_err(&host->pdev->dev, "****glamo_mci_irq before resumed\n");
goto leave;
}
if (!host->mrq || !host->mrq->cmd)
return;
if (!host->mrq)
goto leave;
cmd = host->mrq->cmd;
if (!cmd)
goto leave;
spin_lock_irqsave(&host->lock, flags);
status = readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1);
status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
dev_dbg(&host->pdev->dev, "status = 0x%04x\n", status);
/* we ignore a data timeout report if we are also told the data came */
@@ -310,26 +253,24 @@ static irqreturn_t glamo_mci_irq(int irq, void *devid)
goto done;
}
/*
* disable the initial slow start after first bulk transfer
*/
if (host->force_slow_during_powerup)
host->force_slow_during_powerup--;
/* issue STOP if we have been given one to use */
if (host->mrq->stop)
glamo_mci_send_command(host, host->mrq->stop);
/*
* we perform the memcpy out of Glamo memory outside of IRQ context
* so we don't block other interrupts
*/
schedule_work(&host->irq_work);
goto unlock;
if (cmd->data->flags & MMC_DATA_READ)
do_pio_read(host, cmd->data);
done:
host->mrq = NULL;
mmc_request_done(host->mmc, cmd->mrq);
unlock:
spin_unlock_irqrestore(&host->lock, flags);
leave:
glamo_mci_request_done(host, cmd->mrq);
}
static irqreturn_t glamo_mci_irq(int irq, void *devid)
{
struct glamo_mci_host *host = (struct glamo_mci_host*)devid;
schedule_work(&host->irq_work);
return IRQ_HANDLED;
}
@@ -341,13 +282,12 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
unsigned int timeout = 1000000;
u16 * reg_resp = (u16 *)(host->mmio_base + GLAMO_REG_MMC_CMD_RSP1);
u16 status;
int triggers_int = 1;
/* if we can't do it, reject as busy */
if (!readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1) &
if (!glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1) &
GLAMO_STAT1_MMC_IDLE) {
host->mrq = NULL;
cmd->error = -EBUSY;
mmc_request_done(host->mmc, host->mrq);
return;
}
@@ -360,9 +300,9 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
u8a[5] = (crc7(0, u8a, 5) << 1) | 0x01; /* crc7 on first 5 bytes of packet */
/* issue the wire-order array including CRC in register order */
writew((u8a[4] << 8) | u8a[5], host->mmio_base + GLAMO_REG_MMC_CMD_REG1);
writew((u8a[2] << 8) | u8a[3], host->mmio_base + GLAMO_REG_MMC_CMD_REG2);
writew((u8a[0] << 8) | u8a[1], host->mmio_base + GLAMO_REG_MMC_CMD_REG3);
glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG1, ((u8a[4] << 8) | u8a[5]));
glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG2, ((u8a[2] << 8) | u8a[3]));
glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG3, ((u8a[0] << 8) | u8a[1]));
/* command index toggle */
fire |= (host->request_counter & 1) << 12;
@@ -445,22 +385,31 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
break;
case MMC_STOP_TRANSMISSION:
fire |= GLAMO_FIRE_MMC_CC_STOP; /* STOP */
triggers_int = 0;
break;
default:
fire |= GLAMO_FIRE_MMC_CC_BASIC; /* "basic command" */
triggers_int = 0;
break;
}
if (triggers_int)
host->mrq = cmd->mrq;
/* always largest timeout */
writew(0xfff, host->mmio_base + GLAMO_REG_MMC_TIMEOUT);
glamo_reg_write(host, GLAMO_REG_MMC_TIMEOUT, 0xfff);
/* Generate interrupt on txfer */
glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC, ~0x3e,
0x0800 | GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
GLAMO_BASIC_MMC_EN_COMPL_INT | (sd_drive << 6));
glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC, 0xff36,
0x0800 |
GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
GLAMO_BASIC_MMC_EN_COMPL_INT |
GLAMO_BASIC_MMC_EN_DATA_PUPS |
GLAMO_BASIC_MMC_EN_CMD_PUP);
/* send the command out on the wire */
/* dev_info(&host->pdev->dev, "Using FIRE %04X\n", fire); */
writew(fire, host->mmio_base + GLAMO_REG_MMC_CMD_FIRE);
glamo_reg_write(host, GLAMO_REG_MMC_CMD_FIRE, fire);
/* we are deselecting card? because it isn't going to ack then... */
if ((cmd->opcode == 7) && (cmd->arg == 0))
@@ -470,9 +419,8 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
* we must spin until response is ready or timed out
* -- we don't get interrupts unless there is a bulk rx
*/
udelay(5);
do
status = readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1);
status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
while (((((status >> 15) & 1) != (host->request_counter & 1)) ||
(!(status & (GLAMO_STAT1_MMC_RB_RRDY |
GLAMO_STAT1_MMC_RTOUT |
@@ -511,66 +459,30 @@ static int glamo_mci_prepare_pio(struct glamo_mci_host *host,
struct mmc_data *data)
{
/* set up the block info */
writew(data->blksz, host->mmio_base + GLAMO_REG_MMC_DATBLKLEN);
writew(data->blocks, host->mmio_base + GLAMO_REG_MMC_DATBLKCNT);
dev_dbg(&host->pdev->dev, "(blksz=%d, count=%d)\n",
data->blksz, data->blocks);
glamo_reg_write(host, GLAMO_REG_MMC_DATBLKLEN, data->blksz);
glamo_reg_write(host, GLAMO_REG_MMC_DATBLKCNT, data->blocks);
data->bytes_xfered = 0;
/* if write, prep the write into the shared RAM before the command */
if (data->flags & MMC_DATA_WRITE) {
do_pio_write(host);
do_pio_write(host, data);
}
dev_dbg(&host->pdev->dev, "(blksz=%d, count=%d)\n",
data->blksz, data->blocks);
return 0;
}
static void glamo_mci_send_request(struct mmc_host *mmc)
static int glamo_mci_irq_poll(struct glamo_mci_host *host,
struct mmc_command *cmd)
{
struct glamo_mci_host *host = mmc_priv(mmc);
struct mmc_request *mrq = host->mrq;
struct mmc_command *cmd = mrq->cmd;
int timeout = 1000000;
host->request_counter++;
/* this guy has data to read/write? */
if (cmd->data) {
if(glamo_mci_prepare_pio(host, cmd->data)) {
cmd->data->error = -EIO;
goto done;
}
}
dev_dbg(&host->pdev->dev,"cmd 0x%x, "
"arg 0x%x data=%p mrq->stop=%p flags 0x%x\n",
cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
cmd->flags);
/* resume requested clock rate
* scale it down by sd_slow_ratio if platform requests it
*/
glamo_mci_fix_card_div(host, host->clk_div);
glamo_mci_send_command(host, cmd);
/*
* if we don't have bulk data to take care of, we're done
*/
if (!cmd->data || cmd->error)
goto done;
/*
* Otherwise can can use the interrupt as async completion --
* if there is read data coming, or we wait for write data to complete,
* exit without mmc_request_done() as the payload interrupt
* will service it
*/
dev_dbg(&host->pdev->dev, "Waiting for payload data\n");
/*
* if the glamo INT# line isn't wired (*cough* it can happen)
* I'm afraid we have to spin on the IRQ status bit and "be
* our own INT# line"
*/
if (!host->pdata->core->irq_works) {
/*
* we have faith we will get an "interrupt"...
* but something insane like suspend problems can mean
@@ -584,7 +496,7 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
if (cmd->data->error)
cmd->data->error = -ETIMEDOUT;
dev_err(&host->pdev->dev, "Payload timeout\n");
goto bail;
return -ETIMEDOUT;
}
/* ack this interrupt source */
writew(GLAMO_IRQ_MMC, host->pdata->core->base +
@@ -594,66 +506,74 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
* it will stop clock to card
*/
glamo_mci_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
return 0;
}
static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct glamo_mci_host *host = mmc_priv(mmc);
struct mmc_command *cmd = mrq->cmd;
host->request_counter++;
if (cmd->data) {
if(glamo_mci_prepare_pio(host, cmd->data)) {
cmd->data->error = -EIO;
goto done;
}
}
dev_dbg(&host->pdev->dev,"cmd 0x%x, "
"arg 0x%x data=%p mrq->stop=%p flags 0x%x\n",
cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
cmd->flags);
glamo_mci_clock_enable(host);
glamo_mci_send_command(host, cmd);
/*
* if we don't have bulk data to take care of, we're done
*/
if (!cmd->data || cmd->error)
goto done;
if (!host->pdata->core->irq_works) {
if (glamo_mci_irq_poll(host, mrq->cmd))
goto done;
}
/*
* Otherwise can can use the interrupt as async completion --
* if there is read data coming, or we wait for write data to complete,
* exit without mmc_request_done() as the payload interrupt
* will service it
*/
dev_dbg(&host->pdev->dev, "Waiting for payload data\n");
return;
done:
host->mrq = NULL;
mmc_request_done(host->mmc, cmd->mrq);
bail:
if (!sd_idleclk && !host->force_slow_during_powerup)
/* stop the clock to card */
glamo_mci_fix_card_div(host, -1);
glamo_mci_request_done(host, mrq);
}
static void glamo_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct glamo_mci_host *host = mmc_priv(mmc);
host->mrq = mrq;
glamo_mci_send_request(mmc);
}
static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct glamo_mci_host *host = mmc_priv(mmc);
int bus_width = 0;
int powering = 0;
static void glamo_mci_set_power_mode(struct glamo_mci_host *host,
unsigned char power_mode) {
int ret;
if (host->suspending) {
dev_err(&host->pdev->dev, "IGNORING glamo_mci_set_ios while "
"suspended\n");
if (power_mode == host->power_mode)
return;
}
/* Set power */
switch(ios->power_mode) {
switch(power_mode) {
case MMC_POWER_UP:
if (host->power_mode == MMC_POWER_OFF) {
ret = regulator_enable(host->regulator);
if (ret)
dev_err(&host->pdev->dev, "Failed to enable regulator: %d\n", ret);
break;
case MMC_POWER_ON:
/*
* we should use very slow clock until first bulk
* transfer completes OK
*/
host->force_slow_during_powerup = 1;
if (host->power_mode_current == MMC_POWER_OFF) {
glamo_engine_enable(host->pdata->core,
GLAMO_ENGINE_MMC);
powering = 1;
}
break;
case MMC_POWER_ON:
break;
case MMC_POWER_OFF:
default:
if (host->power_mode_current == MMC_POWER_OFF)
break;
/* never want clocking with dead card */
glamo_mci_fix_card_div(host, -1);
glamo_engine_disable(host->pdata->core,
GLAMO_ENGINE_MMC);
@@ -662,44 +582,50 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
dev_warn(&host->pdev->dev, "Failed to disable regulator: %d\n", ret);
break;
}
host->power_mode_current = ios->power_mode;
host->power_mode = power_mode;
}
if (host->vdd_current != ios->vdd) {
static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct glamo_mci_host *host = mmc_priv(mmc);
int bus_width = 0;
int rate;
int sd_drive;
int ret;
/* Set power */
glamo_mci_set_power_mode(host, ios->power_mode);
if (host->vdd != ios->vdd) {
ret = mmc_regulator_set_ocr(host->regulator, ios->vdd);
if (ret)
dev_err(&host->pdev->dev, "Failed to set regulator voltage: %d\n", ret);
else
host->vdd_current = ios->vdd;
host->vdd = ios->vdd;
}
glamo_mci_set_card_clock(host, ios->clock);
/* after power-up, we are meant to give it >= 74 clocks so it can
* initialize itself. Doubt any modern cards need it but anyway...
*/
if (powering)
mdelay(1);
if (!sd_idleclk && !host->force_slow_during_powerup)
/* stop the clock to card, because we are idle until transfer */
glamo_mci_fix_card_div(host, -1);
rate = glamo_mci_set_card_clock(host, ios->clock);
if ((ios->power_mode == MMC_POWER_ON) ||
(ios->power_mode == MMC_POWER_UP)) {
dev_info(&host->pdev->dev,
"powered (vdd = %d) clk: %lukHz div=%d (req: %ukHz). "
"Bus width=%d\n",(int)ios->vdd,
host->real_rate / 1000, (int)host->clk_div,
"powered (vdd = %hu) clk: %dkHz div=%hu (req: %ukHz). "
"Bus width=%d\n", ios->vdd,
rate / 1000, 0,
ios->clock / 1000, (int)ios->bus_width);
} else
} else {
dev_info(&host->pdev->dev, "glamo_mci_set_ios: power down.\n");
}
/* set bus width */
if (ios->bus_width == MMC_BUS_WIDTH_4)
bus_width = GLAMO_BASIC_MMC_EN_4BIT_DATA;
sd_drive = (rate * 4) / host->clk_rate;
if (sd_drive > 3)
sd_drive = 3;
glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC,
GLAMO_BASIC_MMC_EN_4BIT_DATA |
GLAMO_BASIC_MMC_EN_DR_STR0 |
GLAMO_BASIC_MMC_EN_DR_STR1,
GLAMO_BASIC_MMC_EN_4BIT_DATA | 0xb0,
bus_width | sd_drive << 6);
}
@@ -713,7 +639,7 @@ static int glamo_mci_get_ro(struct mmc_host *mmc)
}
static struct mmc_host_ops glamo_mci_ops = {
.request = glamo_mci_request,
.request = glamo_mci_send_request,
.set_ios = glamo_mci_set_ios,
.get_ro = glamo_mci_get_ro,
};
@@ -736,9 +662,9 @@ static int glamo_mci_probe(struct platform_device *pdev)
host->mmc = mmc;
host->pdev = pdev;
host->pdata = pdev->dev.platform_data;
host->power_mode_current = MMC_POWER_OFF;
host->power_mode = MMC_POWER_OFF;
host->clk_enabled = 0;
spin_lock_init(&host->lock);
INIT_WORK(&host->irq_work, glamo_mci_irq_worker);
host->regulator = regulator_get(pdev->dev.parent, "SD_3V3");
@@ -810,9 +736,8 @@ static int glamo_mci_probe(struct platform_device *pdev)
}
host->vdd_current = 0;
host->clk_rate = 50000000; /* really it's 49152000 */
host->clk_div = 16;
host->vdd = 0;
host->clk_rate = glamo_pll_rate(host->pdata->core, GLAMO_PLL1);
/* explain our host controller capabilities */
mmc->ops = &glamo_mci_ops;
@@ -821,7 +746,7 @@ static int glamo_mci_probe(struct platform_device *pdev)
MMC_CAP_MMC_HIGHSPEED |
MMC_CAP_SD_HIGHSPEED;
mmc->f_min = host->clk_rate / 256;
mmc->f_max = sd_max_clk;
mmc->f_max = host->clk_rate;
mmc->max_blk_count = (1 << 16) - 1; /* GLAMO_REG_MMC_RB_BLKCNT */
mmc->max_blk_size = (1 << 12) - 1; /* GLAMO_REG_MMC_RB_BLKLEN */
@@ -841,21 +766,24 @@ static int glamo_mci_probe(struct platform_device *pdev)
glamo_engine_enable(host->pdata->core, GLAMO_ENGINE_MMC);
glamo_engine_reset(host->pdata->core, GLAMO_ENGINE_MMC);
glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
(u16)(host->data_mem->start));
glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
(u16)(host->data_mem->start >> 16));
glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
(u16)(host->data_mem->start));
glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
(u16)(host->data_mem->start >> 16));
setup_timer(&host->disable_timer, glamo_mci_disable_timer,
(unsigned long)host);
if ((ret = mmc_add_host(mmc))) {
dev_err(&pdev->dev, "failed to add mmc host.\n");
goto probe_freeirq;
}
writew((u16)(host->data_mem->start),
host->mmio_base + GLAMO_REG_MMC_WDATADS1);
writew((u16)((host->data_mem->start) >> 16),
host->mmio_base + GLAMO_REG_MMC_WDATADS2);
writew((u16)host->data_mem->start, host->mmio_base +
GLAMO_REG_MMC_RDATADS1);
writew((u16)(host->data_mem->start >> 16), host->mmio_base +
GLAMO_REG_MMC_RDATADS2);
dev_info(&pdev->dev,"initialisation done.\n");
return 0;
@@ -909,46 +837,36 @@ static int glamo_mci_suspend(struct platform_device *dev, pm_message_t state)
cancel_work_sync(&host->irq_work);
/*
* possible workaround for SD corruption during suspend - resume
* make sure the clock was running during suspend and consequently
* resume
*/
glamo_mci_fix_card_div(host, host->clk_div);
/* we are going to do more commands to override this in
* mmc_suspend_host(), so we need to change sd_idleclk for the
* duration as well
*/
suspend_sd_idleclk = sd_idleclk;
sd_idleclk = 1;
ret = mmc_suspend_host(mmc, state);
host->suspending++;
glamo_mci_clock_enable(host);
return ret;
}
int glamo_mci_resume(struct platform_device *dev)
static int glamo_mci_resume(struct platform_device *dev)
{
struct mmc_host *mmc = platform_get_drvdata(dev);
struct glamo_mci_host *host = mmc_priv(mmc);
int ret;
sd_idleclk = 1;
glamo_engine_enable(host->pdata->core, GLAMO_ENGINE_MMC);
glamo_engine_reset(host->pdata->core, GLAMO_ENGINE_MMC);
host->suspending--;
glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
(u16)(host->data_mem->start));
glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
(u16)(host->data_mem->start >> 16));
ret = mmc_resume_host(mmc);
glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
(u16)(host->data_mem->start));
glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
(u16)(host->data_mem->start >> 16));
mdelay(5);
/* put sd_idleclk back to pre-suspend state */
sd_idleclk = suspend_sd_idleclk;
ret = mmc_resume_host(host->mmc);
/* glamo_mci_clock_disable(host);*/
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(glamo_mci_resume);

43
target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.h
View File

@@ -1,43 +0,0 @@
/*
* linux/drivers/mmc/host/glamo-mmc.h - GLAMO MCI driver
*
* Copyright (C) 2007-2008 Openmoko, Inc, Andy Green <andy@openmoko.com>
* based on S3C MMC driver -->
* Copyright (C) 2004-2006 Thomas Kleffel, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/regulator/consumer.h>
struct glamo_mci_host {
struct platform_device *pdev;
struct glamo_mmc_platform_data *pdata;
struct mmc_host *mmc;
struct resource *mmio_mem;
struct resource *data_mem;
void __iomem *mmio_base;
u16 __iomem *data_base;
int suspending;
int power_mode_current;
unsigned int vdd_current;
unsigned long clk_rate;
unsigned long clk_div;
unsigned long real_rate;
int force_slow_during_powerup;
struct mmc_request *mrq;
struct work_struct irq_work;
spinlock_t lock;
unsigned int request_counter;
struct regulator *regulator;
};