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tifm_7xx1: improve card detection routine

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Remove unneeded conditions and change a sleeping regime a little in the
card type detection routine.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Alex Dubov 2007-04-12 16:59:16 +10:00 committed by Pierre Ossman
parent 3540af8ffd
commit 342c0ec485
1 changed files with 21 additions and 25 deletions
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46
drivers/misc/tifm_7xx1.c
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@ -75,48 +75,46 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
int is_x2)
static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
{
unsigned int s_state;
int cnt;
writel(0x0e00, sock_addr + SOCK_CONTROL);
for (cnt = 0; cnt < 100; cnt++) {
for (cnt = 16; cnt <= 256; cnt <<= 1) {
if (!(TIFM_SOCK_STATE_POWERED
& readl(sock_addr + SOCK_PRESENT_STATE)))
break;
msleep(10);
msleep(cnt);
}
s_state = readl(sock_addr + SOCK_PRESENT_STATE);
if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
return 0;
if (is_x2) {
writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
} else {
// SmartMedia cards need extra 40 msec
if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
msleep(40);
writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
sock_addr + SOCK_CONTROL);
msleep(10);
writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
sock_addr + SOCK_CONTROL);
}
writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
sock_addr + SOCK_CONTROL);
for (cnt = 0; cnt < 100; cnt++) {
/* xd needs some extra time before power on */
if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
== TIFM_TYPE_XD)
msleep(40);
writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
/* wait for power to stabilize */
msleep(20);
for (cnt = 16; cnt <= 256; cnt <<= 1) {
if ((TIFM_SOCK_STATE_POWERED
& readl(sock_addr + SOCK_PRESENT_STATE)))
break;
msleep(10);
msleep(cnt);
}
if (!is_x2)
writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
sock_addr + SOCK_CONTROL);
writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
sock_addr + SOCK_CONTROL);
return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
}
@ -169,8 +167,7 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
spin_unlock_irqrestore(&fm->lock, flags);
media_id = tifm_7xx1_toggle_sock_power(
tifm_7xx1_sock_addr(fm->addr, cnt),
fm->num_sockets == 2);
tifm_7xx1_sock_addr(fm->addr, cnt));
if (media_id) {
sock = tifm_alloc_device(fm);
if (sock) {
@ -258,8 +255,7 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
for (cnt = 0; cnt < fm->num_sockets; cnt++)
new_ids[cnt] = tifm_7xx1_toggle_sock_power(
tifm_7xx1_sock_addr(fm->addr, cnt),
fm->num_sockets == 2);
tifm_7xx1_sock_addr(fm->addr, cnt));
spin_lock_irqsave(&fm->lock, flags);
fm->socket_change_set = 0;
for (cnt = 0; cnt < fm->num_sockets; cnt++) {