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memstick: optimize setup of JMicron host parameters 

Set correct clock management values to improve over-all performance.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Dubov 2008-03-19 17:01:08 -07:00 коммит произвёл Linus Torvalds
Родитель 962ee1b10b
Коммит cf821e8f53
1 изменённых файлов: 30 добавлений и 30 удалений
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60
drivers/memstick/host/jmb38x_ms.c
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@ -131,6 +131,12 @@ struct jmb38x_ms {
#define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
#define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
#define CLOCK_CONTROL_40MHZ 0x00000001
#define CLOCK_CONTROL_50MHZ 0x00000002
#define CLOCK_CONTROL_60MHZ 0x00000008
#define CLOCK_CONTROL_62_5MHZ 0x0000000c
#define CLOCK_CONTROL_OFF 0x00000000
enum {
CMD_READY = 0x01,
FIFO_READY = 0x02,
@ -607,19 +613,18 @@ static void jmb38x_ms_reset(struct jmb38x_ms_host *host)
{
unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
writel(host_ctl | HOST_CONTROL_RESET_REQ | HOST_CONTROL_RESET,
host->addr + HOST_CONTROL);
writel(HOST_CONTROL_RESET_REQ, host->addr + HOST_CONTROL);
while (HOST_CONTROL_RESET_REQ
& (host_ctl = readl(host->addr + HOST_CONTROL))) {
ndelay(100);
dev_dbg(&host->chip->pdev->dev, "reset\n");
ndelay(20);
dev_dbg(&host->chip->pdev->dev, "reset %08x\n", host_ctl);
}
writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
writel(HOST_CONTROL_RESET, host->addr + HOST_CONTROL);
mmiowb();
writel(INT_STATUS_ALL, host->addr + INT_SIGNAL_ENABLE);
dev_dbg(&host->chip->pdev->dev, "reset\n");
writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
}
static void jmb38x_ms_set_param(struct memstick_host *msh,
@ -627,10 +632,8 @@ static void jmb38x_ms_set_param(struct memstick_host *msh,
int value)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned int host_ctl;
unsigned long flags;
spin_lock_irqsave(&host->lock, flags);
unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
unsigned int clock_ctl = CLOCK_CONTROL_40MHZ, clock_delay = 0;
switch (param) {
case MEMSTICK_POWER:
@ -638,60 +641,57 @@ static void jmb38x_ms_set_param(struct memstick_host *msh,
jmb38x_ms_reset(host);
writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
: PAD_PU_PD_ON_MS_SOCK0,
: PAD_PU_PD_ON_MS_SOCK0,
host->addr + PAD_PU_PD);
writel(PAD_OUTPUT_ENABLE_MS,
host->addr + PAD_OUTPUT_ENABLE);
host_ctl = readl(host->addr + HOST_CONTROL);
host_ctl |= 7;
writel(host_ctl | (HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN),
host->addr + HOST_CONTROL);
host_ctl = 7;
host_ctl |= HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN;
writel(host_ctl, host->addr + HOST_CONTROL);
dev_dbg(&host->chip->pdev->dev, "power on\n");
} else if (value == MEMSTICK_POWER_OFF) {
writel(readl(host->addr + HOST_CONTROL)
& ~(HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN),
host->addr + HOST_CONTROL);
host_ctl &= ~(HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN);
writel(host_ctl, host->addr + HOST_CONTROL);
writel(0, host->addr + PAD_OUTPUT_ENABLE);
writel(PAD_PU_PD_OFF, host->addr + PAD_PU_PD);
dev_dbg(&host->chip->pdev->dev, "power off\n");
}
break;
case MEMSTICK_INTERFACE:
/* jmb38x_ms_reset(host); */
host_ctl = readl(host->addr + HOST_CONTROL);
host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
/* host_ctl |= 7; */
if (value == MEMSTICK_SERIAL) {
host_ctl &= ~HOST_CONTROL_FAST_CLK;
host_ctl |= HOST_CONTROL_IF_SERIAL
<< HOST_CONTROL_IF_SHIFT;
host_ctl |= HOST_CONTROL_REI;
writel(0, host->addr + CLOCK_DELAY);
clock_ctl = CLOCK_CONTROL_40MHZ;
clock_delay = 0;
} else if (value == MEMSTICK_PAR4) {
host_ctl |= HOST_CONTROL_FAST_CLK;
host_ctl |= HOST_CONTROL_IF_PAR4
<< HOST_CONTROL_IF_SHIFT;
host_ctl &= ~HOST_CONTROL_REI;
writel(4, host->addr + CLOCK_DELAY);
clock_ctl = CLOCK_CONTROL_40MHZ;
clock_delay = 4;
} else if (value == MEMSTICK_PAR8) {
host_ctl |= HOST_CONTROL_FAST_CLK;
host_ctl |= HOST_CONTROL_IF_PAR8
<< HOST_CONTROL_IF_SHIFT;
host_ctl &= ~HOST_CONTROL_REI;
writel(4, host->addr + CLOCK_DELAY);
clock_ctl = CLOCK_CONTROL_60MHZ;
clock_delay = 0;
}
writel(host_ctl, host->addr + HOST_CONTROL);
writel(clock_ctl, host->addr + CLOCK_CONTROL);
writel(clock_delay, host->addr + CLOCK_DELAY);
break;
};
spin_unlock_irqrestore(&host->lock, flags);
}
#ifdef CONFIG_PM