#include <linux/sysdev.h>
#include <mach/hardware.h>
-#include <mach/mfp.h>
#include <mach/mfp-pxa3xx.h>
#include <mach/pxa3xx-regs.h>
-/* mfp_spin_lock is used to ensure that MFP register configuration
- * (most likely a read-modify-write operation) is atomic, and that
- * mfp_table[] is consistent
- */
-static DEFINE_SPINLOCK(mfp_spin_lock);
-
-static void __iomem *mfpr_mmio_base = (void __iomem *)&__REG(MFPR_BASE);
-
-struct pxa3xx_mfp_pin {
- unsigned long config; /* -1 for not configured */
- unsigned long mfpr_off; /* MFPRxx Register offset */
- unsigned long mfpr_run; /* Run-Mode Register Value */
- unsigned long mfpr_lpm; /* Low Power Mode Register Value */
-};
-
-static struct pxa3xx_mfp_pin mfp_table[MFP_PIN_MAX];
-
-/* mapping of MFP_LPM_* definitions to MFPR_LPM_* register bits */
-static const unsigned long mfpr_lpm[] = {
- MFPR_LPM_INPUT,
- MFPR_LPM_DRIVE_LOW,
- MFPR_LPM_DRIVE_HIGH,
- MFPR_LPM_PULL_LOW,
- MFPR_LPM_PULL_HIGH,
- MFPR_LPM_FLOAT,
-};
-
-/* mapping of MFP_PULL_* definitions to MFPR_PULL_* register bits */
-static const unsigned long mfpr_pull[] = {
- MFPR_PULL_NONE,
- MFPR_PULL_LOW,
- MFPR_PULL_HIGH,
- MFPR_PULL_BOTH,
-};
-
-/* mapping of MFP_LPM_EDGE_* definitions to MFPR_EDGE_* register bits */
-static const unsigned long mfpr_edge[] = {
- MFPR_EDGE_NONE,
- MFPR_EDGE_RISE,
- MFPR_EDGE_FALL,
- MFPR_EDGE_BOTH,
-};
-
-#define mfpr_readl(off) \
- __raw_readl(mfpr_mmio_base + (off))
-
-#define mfpr_writel(off, val) \
- __raw_writel(val, mfpr_mmio_base + (off))
-
-#define mfp_configured(p) ((p)->config != -1)
-
-/*
- * perform a read-back of any MFPR register to make sure the
- * previous writings are finished
- */
-#define mfpr_sync() (void)__raw_readl(mfpr_mmio_base + 0)
-
-static inline void __mfp_config_run(struct pxa3xx_mfp_pin *p)
-{
- if (mfp_configured(p))
- mfpr_writel(p->mfpr_off, p->mfpr_run);
-}
-
-static inline void __mfp_config_lpm(struct pxa3xx_mfp_pin *p)
-{
- if (mfp_configured(p)) {
- unsigned long mfpr_clr = (p->mfpr_run & ~MFPR_EDGE_BOTH) | MFPR_EDGE_CLEAR;
- if (mfpr_clr != p->mfpr_run)
- mfpr_writel(p->mfpr_off, mfpr_clr);
- if (p->mfpr_lpm != mfpr_clr)
- mfpr_writel(p->mfpr_off, p->mfpr_lpm);
- }
-}
-
-void pxa3xx_mfp_config(unsigned long *mfp_cfgs, int num)
-{
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&mfp_spin_lock, flags);
-
- for (i = 0; i < num; i++, mfp_cfgs++) {
- unsigned long tmp, c = *mfp_cfgs;
- struct pxa3xx_mfp_pin *p;
- int pin, af, drv, lpm, edge, pull;
-
- pin = MFP_PIN(c);
- BUG_ON(pin >= MFP_PIN_MAX);
- p = &mfp_table[pin];
-
- af = MFP_AF(c);
- drv = MFP_DS(c);
- lpm = MFP_LPM_STATE(c);
- edge = MFP_LPM_EDGE(c);
- pull = MFP_PULL(c);
-
- /* run-mode pull settings will conflict with MFPR bits of
- * low power mode state, calculate mfpr_run and mfpr_lpm
- * individually if pull != MFP_PULL_NONE
- */
- tmp = MFPR_AF_SEL(af) | MFPR_DRIVE(drv);
-
- if (likely(pull == MFP_PULL_NONE)) {
- p->mfpr_run = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
- p->mfpr_lpm = p->mfpr_run;
- } else {
- p->mfpr_lpm = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
- p->mfpr_run = tmp | mfpr_pull[pull];
- }
-
- p->config = c; __mfp_config_run(p);
- }
-
- mfpr_sync();
- spin_unlock_irqrestore(&mfp_spin_lock, flags);
-}
-
-unsigned long pxa3xx_mfp_read(int mfp)
-{
- unsigned long val, flags;
-
- BUG_ON(mfp >= MFP_PIN_MAX);
-
- spin_lock_irqsave(&mfp_spin_lock, flags);
- val = mfpr_readl(mfp_table[mfp].mfpr_off);
- spin_unlock_irqrestore(&mfp_spin_lock, flags);
-
- return val;
-}
-
-void pxa3xx_mfp_write(int mfp, unsigned long val)
-{
- unsigned long flags;
-
- BUG_ON(mfp >= MFP_PIN_MAX);
-
- spin_lock_irqsave(&mfp_spin_lock, flags);
- mfpr_writel(mfp_table[mfp].mfpr_off, val);
- mfpr_sync();
- spin_unlock_irqrestore(&mfp_spin_lock, flags);
-}
-
-void __init pxa3xx_mfp_init_addr(struct pxa3xx_mfp_addr_map *map)
-{
- struct pxa3xx_mfp_addr_map *p;
- unsigned long offset, flags;
- int i;
-
- spin_lock_irqsave(&mfp_spin_lock, flags);
-
- for (p = map; p->start != MFP_PIN_INVALID; p++) {
- offset = p->offset;
- i = p->start;
-
- do {
- mfp_table[i].mfpr_off = offset;
- mfp_table[i].mfpr_run = 0;
- mfp_table[i].mfpr_lpm = 0;
- offset += 4; i++;
- } while ((i <= p->end) && (p->end != -1));
- }
-
- spin_unlock_irqrestore(&mfp_spin_lock, flags);
-}
-
-void __init pxa3xx_init_mfp(void)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(mfp_table); i++)
- mfp_table[i].config = -1;
-}
-
#ifdef CONFIG_PM
/*
* Configure the MFPs appropriately for suspend/resume.
*/
static int pxa3xx_mfp_suspend(struct sys_device *d, pm_message_t state)
{
- int pin;
-
- for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++) {
- struct pxa3xx_mfp_pin *p = &mfp_table[pin];
- __mfp_config_lpm(p);
- }
+ mfp_config_lpm();
return 0;
}
static int pxa3xx_mfp_resume(struct sys_device *d)
{
- int pin;
-
- for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++) {
- struct pxa3xx_mfp_pin *p = &mfp_table[pin];
- __mfp_config_run(p);
- }
+ mfp_config_run();
/* clear RDH bit when MFP settings are restored
*
* preserve them here in case they will be referenced later
*/
ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
-
return 0;
}
#else
git.samba.org / sfrench / cifs-2.6.git / blobdiff