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Code

ar71xx: optimize register access in ar724x_pci.c

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20285 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2010-03-18 19:19:10 +00:00
parent a95e8602ca
commit b8bc300bd3
1 changed files with 37 additions and 38 deletions
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75
target/linux/ar71xx/files/arch/mips/pci/pci-ar724x.c
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@ -35,22 +35,6 @@ static int ar724x_pci_fixup_enable;
static DEFINE_SPINLOCK(ar724x_pci_lock);
static inline void ar724x_pci_wr(unsigned reg, u32 val)
{
__raw_writel(val, ar724x_pci_ctrl_base + reg);
(void) __raw_readl(ar724x_pci_ctrl_base + reg);
}
static inline void ar724x_pci_wr_nf(unsigned reg, u32 val)
{
__raw_writel(val, ar724x_pci_ctrl_base + reg);
}
static inline u32 ar724x_pci_rr(unsigned reg)
{
return __raw_readl(ar724x_pci_ctrl_base + reg);
}
static void ar724x_pci_read(void __iomem *base, int where, int size, u32 *value)
{
unsigned long flags;
@ -233,6 +217,7 @@ static void __init ar724x_pci_reset(void)
static int __init ar724x_pci_setup(void)
{
void __iomem *base = ar724x_pci_ctrl_base;
u32 t;
/* setup COMMAND register */
@ -243,19 +228,21 @@ static int __init ar724x_pci_setup(void)
ar724x_pci_write(ar724x_pci_localcfg_base, 0x20, 4, 0x1ff01000);
ar724x_pci_write(ar724x_pci_localcfg_base, 0x24, 4, 0x1ff01000);
t = ar724x_pci_rr(AR724X_PCI_REG_RESET);
t = __raw_readl(base + AR724X_PCI_REG_RESET);
if (t != 0x7) {
udelay(100000);
ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 0);
__raw_writel(0, base + AR724X_PCI_REG_RESET);
udelay(100);
ar724x_pci_wr_nf(AR724X_PCI_REG_RESET, 4);
__raw_writel(4, base + AR724X_PCI_REG_RESET);
udelay(100000);
}
ar724x_pci_wr(AR724X_PCI_REG_APP, AR724X_PCI_APP_LTSSM_ENABLE);
__raw_writel(AR724X_PCI_APP_LTSSM_ENABLE, base + AR724X_PCI_REG_APP);
/* flush write */
(void) __raw_readl(base + AR724X_PCI_REG_APP);
udelay(1000);
t = ar724x_pci_rr(AR724X_PCI_REG_APP);
t = __raw_readl(base + AR724X_PCI_REG_APP);
if ((t & AR724X_PCI_APP_LTSSM_ENABLE) == 0x0) {
printk(KERN_WARNING "PCI: no PCIe module found\n");
return -ENODEV;
@ -266,10 +253,11 @@ static int __init ar724x_pci_setup(void)
static void ar724x_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
{
void __iomem *base = ar724x_pci_ctrl_base;
u32 pending;
pending = ar724x_pci_rr(AR724X_PCI_REG_INT_STATUS) &
ar724x_pci_rr(AR724X_PCI_REG_INT_MASK);
pending = __raw_readl(base + AR724X_PCI_REG_INT_STATUS) &
__raw_readl(base + AR724X_PCI_REG_INT_MASK);
if (pending & AR724X_PCI_INT_DEV0)
generic_handle_irq(AR71XX_PCI_IRQ_DEV0);
@ -280,33 +268,43 @@ static void ar724x_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
static void ar724x_pci_irq_unmask(unsigned int irq)
{
void __iomem *base = ar724x_pci_ctrl_base;
u32 t;
switch (irq) {
case AR71XX_PCI_IRQ_DEV0:
irq -= AR71XX_PCI_IRQ_BASE;
ar724x_pci_wr(AR724X_PCI_REG_INT_MASK,
ar724x_pci_rr(AR724X_PCI_REG_INT_MASK) |
AR724X_PCI_INT_DEV0);
t = __raw_readl(base + AR724X_PCI_REG_INT_MASK);
__raw_writel(t | AR724X_PCI_INT_DEV0,
base + AR724X_PCI_REG_INT_MASK);
/* flush write */
ar724x_pci_rr(AR724X_PCI_REG_INT_MASK);
(void) __raw_readl(base + AR724X_PCI_REG_INT_MASK);
}
}
static void ar724x_pci_irq_mask(unsigned int irq)
{
void __iomem *base = ar724x_pci_ctrl_base;
u32 t;
switch (irq) {
case AR71XX_PCI_IRQ_DEV0:
irq -= AR71XX_PCI_IRQ_BASE;
ar724x_pci_wr(AR724X_PCI_REG_INT_MASK,
ar724x_pci_rr(AR724X_PCI_REG_INT_MASK) &
~AR724X_PCI_INT_DEV0);
/* flush write */
ar724x_pci_rr(AR724X_PCI_REG_INT_MASK);
ar724x_pci_wr(AR724X_PCI_REG_INT_STATUS,
ar724x_pci_rr(AR724X_PCI_REG_INT_STATUS) |
AR724X_PCI_INT_DEV0);
t = __raw_readl(base + AR724X_PCI_REG_INT_MASK);
__raw_writel(t & ~AR724X_PCI_INT_DEV0,
base + AR724X_PCI_REG_INT_MASK);
/* flush write */
ar724x_pci_rr(AR724X_PCI_REG_INT_STATUS);
(void) __raw_readl(base + AR724X_PCI_REG_INT_MASK);
t = __raw_readl(base + AR724X_PCI_REG_INT_STATUS);
__raw_writel(t | AR724X_PCI_INT_DEV0,
base + AR724X_PCI_REG_INT_STATUS);
/* flush write */
(void) __raw_readl(base + AR724X_PCI_REG_INT_STATUS);
}
}
@ -319,6 +317,7 @@ static struct irq_chip ar724x_pci_irq_chip = {
static void __init ar724x_pci_irq_init(void)
{
void __iomem *base = ar724x_pci_ctrl_base;
u32 t;
int i;
@ -328,8 +327,8 @@ static void __init ar724x_pci_irq_init(void)
return;
}
ar724x_pci_wr(AR724X_PCI_REG_INT_MASK, 0);
ar724x_pci_wr(AR724X_PCI_REG_INT_STATUS, 0);
__raw_writel(0, base + AR724X_PCI_REG_INT_MASK);
__raw_writel(0, base + AR724X_PCI_REG_INT_STATUS);
for (i = AR71XX_PCI_IRQ_BASE;
i < AR71XX_PCI_IRQ_BASE + AR71XX_PCI_IRQ_COUNT; i++) {