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| author | Alex Dubov <oakad@yahoo.com> | 2007-04-12 16:59:16 +1000 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-01 13:04:13 +0200 |
| commit | 342c0ec4859446140c0dc5d7d903bb3b3f0577cd (patch) | |
| tree | 0b2e7fc07d23cd845c74da0ddf257f183427db10 /drivers/misc/tifm_7xx1.c | |
| parent | 3540af8ffddcdbc7573451ac0b5cd57a2eaf8af5 (diff) | |
| download | kernel_samsung_smdk4412-342c0ec4859446140c0dc5d7d903bb3b3f0577cd.tar.gz kernel_samsung_smdk4412-342c0ec4859446140c0dc5d7d903bb3b3f0577cd.tar.bz2 kernel_samsung_smdk4412-342c0ec4859446140c0dc5d7d903bb3b3f0577cd.zip | |
tifm_7xx1: improve card detection routine
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>
Diffstat (limited to 'drivers/misc/tifm_7xx1.c')
| -rw-r--r-- | drivers/misc/tifm_7xx1.c | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c index e5655fef42d..34746798ba8 100644 --- a/drivers/misc/tifm_7xx1.c +++ b/drivers/misc/tifm_7xx1.c @@ -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++) { |