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ramips: fix RT3883 PCI driver 

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36261 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Gabor Juhos 2013-04-07 20:56:18 +00:00
parent 2ea7a39705
commit c797fdfb4d
1 changed files with 856 additions and 0 deletions
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856
target/linux/ramips/patches-3.8/0131-MIPS-pci-rt3883-rewrite.patch Normal file
View File

@ -0,0 +1,856 @@
--- a/arch/mips/pci/pci-rt3883.c
+++ b/arch/mips/pci/pci-rt3883.c
@@ -1,7 +1,7 @@
/*
- * Ralink RT3883 SoC PCI support
+ * Ralink RT3662/RT3883 SoC PCI support
*
- * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
*
* Parts of this file are based on Ralink's 2.6.21 BSP
*
@@ -16,52 +16,82 @@
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/platform_device.h>
#include <asm/mach-ralink/rt3883.h>
-#include <asm/mach-ralink/rt3883_regs.h>
+#include <asm/mach-ralink/ralink_regs.h>
#define RT3883_MEMORY_BASE 0x00000000
#define RT3883_MEMORY_SIZE 0x02000000
-#define RT3883_PCI_MEM_BASE 0x20000000
-#define RT3883_PCI_MEM_SIZE 0x10000000
-#define RT3883_PCI_IO_BASE 0x10160000
-#define RT3883_PCI_IO_SIZE 0x00010000
-
-#define RT3883_PCI_REG_PCICFG_ADDR 0x00
-#define RT3883_PCI_REG_PCIRAW_ADDR 0x04
-#define RT3883_PCI_REG_PCIINT_ADDR 0x08
-#define RT3883_PCI_REG_PCIMSK_ADDR 0x0c
-#define RT3833_PCI_PCIINT_PCIE BIT(20)
-#define RT3833_PCI_PCIINT_PCI1 BIT(19)
-#define RT3833_PCI_PCIINT_PCI0 BIT(18)
+#define RT3883_PCI_REG_PCICFG 0x00
+#define RT3883_PCICFG_P2P_BR_DEVNUM_M 0xf
+#define RT3883_PCICFG_P2P_BR_DEVNUM_S 16
+#define RT3883_PCICFG_PCIRST BIT(1)
+#define RT3883_PCI_REG_PCIRAW 0x04
+#define RT3883_PCI_REG_PCIINT 0x08
+#define RT3883_PCI_REG_PCIENA 0x0c
-#define RT3883_PCI_REG_CONFIG_ADDR 0x20
-#define RT3883_PCI_REG_CONFIG_DATA 0x24
+#define RT3883_PCI_REG_CFGADDR 0x20
+#define RT3883_PCI_REG_CFGDATA 0x24
#define RT3883_PCI_REG_MEMBASE 0x28
#define RT3883_PCI_REG_IOBASE 0x2c
#define RT3883_PCI_REG_ARBCTL 0x80
#define RT3883_PCI_REG_BASE(_x) (0x1000 + (_x) * 0x1000)
-#define RT3883_PCI_REG_BAR0SETUP_ADDR(_x) (RT3883_PCI_REG_BASE((_x)) + 0x10)
-#define RT3883_PCI_REG_IMBASEBAR0_ADDR(_x) (RT3883_PCI_REG_BASE((_x)) + 0x18)
+#define RT3883_PCI_REG_BAR0SETUP(_x) (RT3883_PCI_REG_BASE((_x)) + 0x10)
+#define RT3883_PCI_REG_IMBASEBAR0(_x) (RT3883_PCI_REG_BASE((_x)) + 0x18)
#define RT3883_PCI_REG_ID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x30)
#define RT3883_PCI_REG_CLASS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x34)
#define RT3883_PCI_REG_SUBID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x38)
#define RT3883_PCI_REG_STATUS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x50)
-static int (*rt3883_pci_plat_dev_init)(struct pci_dev *dev);
-static void __iomem *rt3883_pci_base;
-static DEFINE_SPINLOCK(rt3883_pci_lock);
+#define RT3883_PCI_MODE_NONE 0
+#define RT3883_PCI_MODE_PCI BIT(0)
+#define RT3883_PCI_MODE_PCIE BIT(1)
+#define RT3883_PCI_MODE_BOTH (RT3883_PCI_MODE_PCI | RT3883_PCI_MODE_PCIE)
-static inline u32 rt3883_pci_rr(unsigned reg)
+#define RT3883_PCI_IRQ_COUNT 32
+
+#define RT3883_P2P_BR_DEVNUM 1
+
+struct rt3883_pci_controller {
+ void __iomem *base;
+ spinlock_t lock;
+
+ struct irq_domain *irq_domain;
+
+ struct pci_controller pci_controller;
+ struct resource io_res;
+ struct resource mem_res;
+
+ bool pcie_ready;
+ unsigned char p2p_devnum;
+};
+
+static inline struct rt3883_pci_controller *
+pci_bus_to_rt3883_controller(struct pci_bus *bus)
{
- return readl(rt3883_pci_base + reg);
+ struct pci_controller *hose;
+
+ hose = (struct pci_controller *) bus->sysdata;
+ return container_of(hose, struct rt3883_pci_controller, pci_controller);
+}
+
+static inline u32 rt3883_pci_r32(struct rt3883_pci_controller *rpc,
+ unsigned reg)
+{
+ return ioread32(rpc->base + reg);
}
-static inline void rt3883_pci_wr(u32 val, unsigned reg)
+static inline void rt3883_pci_w32(struct rt3883_pci_controller *rpc,
+ u32 val, unsigned reg)
{
- writel(val, rt3883_pci_base + reg);
+ iowrite32(val, rpc->base + reg);
}
static inline u32 rt3883_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
@@ -71,7 +101,8 @@ static inline u32 rt3883_pci_get_cfgaddr
0x80000000);
}
-static u32 rt3883_pci_read_u32(unsigned bus, unsigned slot,
+static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc,
+ unsigned bus, unsigned slot,
unsigned func, unsigned reg)
{
unsigned long flags;
@@ -80,15 +111,16 @@ static u32 rt3883_pci_read_u32(unsigned
address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
- spin_lock_irqsave(&rt3883_pci_lock, flags);
- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
- ret = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
+ spin_lock_irqsave(&rpc->lock, flags);
+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
+ ret = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
+ spin_unlock_irqrestore(&rpc->lock, flags);
return ret;
}
-static void rt3883_pci_write_u32(unsigned bus, unsigned slot,
+static void rt3883_pci_write_cfg32(struct rt3883_pci_controller *rpc,
+ unsigned bus, unsigned slot,
unsigned func, unsigned reg, u32 val)
{
unsigned long flags;
@@ -96,84 +128,61 @@ static void rt3883_pci_write_u32(unsigne
address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
- spin_lock_irqsave(&rt3883_pci_lock, flags);
- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
- rt3883_pci_wr(val, RT3883_PCI_REG_CONFIG_DATA);
- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
+ spin_lock_irqsave(&rpc->lock, flags);
+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
+ rt3883_pci_w32(rpc, val, RT3883_PCI_REG_CFGDATA);
+ spin_unlock_irqrestore(&rpc->lock, flags);
}
static void rt3883_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
{
+ struct rt3883_pci_controller *rpc;
u32 pending;
- pending = rt3883_pci_rr(RT3883_PCI_REG_PCIINT_ADDR) &
- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
+ rpc = irq_get_handler_data(irq);
+
+ pending = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIINT) &
+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
if (!pending) {
spurious_interrupt();
return;
}
- if (pending & RT3833_PCI_PCIINT_PCI0)
- generic_handle_irq(RT3883_PCI_IRQ_PCI0);
+ while (pending) {
+ unsigned bit = __ffs(pending);
- if (pending & RT3833_PCI_PCIINT_PCI1)
- generic_handle_irq(RT3883_PCI_IRQ_PCI1);
+ irq = irq_find_mapping(rpc->irq_domain, bit);
+ generic_handle_irq(irq);
- if (pending & RT3833_PCI_PCIINT_PCIE)
- generic_handle_irq(RT3883_PCI_IRQ_PCIE);
+ pending &= ~BIT(bit);
+ }
}
static void rt3883_pci_irq_unmask(struct irq_data *d)
{
- int irq = d->irq;
- u32 mask;
+ struct rt3883_pci_controller *rpc;
u32 t;
- switch (irq) {
- case RT3883_PCI_IRQ_PCI0:
- mask = RT3833_PCI_PCIINT_PCI0;
- break;
- case RT3883_PCI_IRQ_PCI1:
- mask = RT3833_PCI_PCIINT_PCI1;
- break;
- case RT3883_PCI_IRQ_PCIE:
- mask = RT3833_PCI_PCIINT_PCIE;
- break;
- default:
- BUG();
- }
+ rpc = irq_data_get_irq_chip_data(d);
- t = rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
- rt3883_pci_wr(t | mask, RT3883_PCI_REG_PCIMSK_ADDR);
+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
+ rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
/* flush write */
- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
}
static void rt3883_pci_irq_mask(struct irq_data *d)
{
- int irq = d->irq;
- u32 mask;
+ struct rt3883_pci_controller *rpc;
u32 t;
- switch (irq) {
- case RT3883_PCI_IRQ_PCI0:
- mask = RT3833_PCI_PCIINT_PCI0;
- break;
- case RT3883_PCI_IRQ_PCI1:
- mask = RT3833_PCI_PCIINT_PCI1;
- break;
- case RT3883_PCI_IRQ_PCIE:
- mask = RT3833_PCI_PCIINT_PCIE;
- break;
- default:
- BUG();
- }
+ rpc = irq_data_get_irq_chip_data(d);
- t = rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
- rt3883_pci_wr(t & ~mask, RT3883_PCI_REG_PCIMSK_ADDR);
+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
+ rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
/* flush write */
- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
}
static struct irq_chip rt3883_pci_irq_chip = {
@@ -183,36 +192,84 @@ static struct irq_chip rt3883_pci_irq_ch
.irq_mask_ack = rt3883_pci_irq_mask,
};
-static void __init rt3883_pci_irq_init(void)
+static int rt3883_pci_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
{
- int i;
+ irq_set_chip_and_handler(irq, &rt3883_pci_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, d->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops rt3883_pci_irq_domain_ops = {
+ .map = rt3883_pci_irq_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+static int rt3883_pci_irq_init(struct device *dev,
+ struct rt3883_pci_controller *rpc)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *intc_np;
+ int irq;
+ int err;
+
+ intc_np = of_get_child_by_name(np, "interrupt-controller");
+ if (!intc_np) {
+ dev_err(dev, "no %s child node found", "interrupt-controller");
+ return -ENODEV;
+ }
+
+ irq = irq_of_parse_and_map(intc_np, 0);
+ if (irq == 0) {
+ dev_err(dev, "%s has no IRQ", of_node_full_name(intc_np));
+ err = -EINVAL;
+ goto err_put_intc;
+ }
/* disable all interrupts */
- rt3883_pci_wr(0, RT3883_PCI_REG_PCIMSK_ADDR);
+ rt3883_pci_w32(rpc, 0, RT3883_PCI_REG_PCIENA);
- for (i = RT3883_PCI_IRQ_BASE;
- i < RT3883_PCI_IRQ_BASE + RT3883_PCI_IRQ_COUNT; i++) {
- irq_set_chip_and_handler(i, &rt3883_pci_irq_chip,
- handle_level_irq);
+ rpc->irq_domain =
+ irq_domain_add_linear(intc_np, RT3883_PCI_IRQ_COUNT,
+ &rt3883_pci_irq_domain_ops,
+ rpc);
+ if (!rpc->irq_domain) {
+ dev_err(dev, "unable to add IRQ domain\n");
+ err = -ENODEV;
+ goto err_put_intc;
}
- irq_set_chained_handler(RT3883_CPU_IRQ_PCI, rt3883_pci_irq_handler);
+ irq_set_handler_data(irq, rpc);
+ irq_set_chained_handler(irq, rt3883_pci_irq_handler);
+
+ return 0;
+
+err_put_intc:
+ of_node_put(intc_np);
+ return err;
}
static int rt3883_pci_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
+ struct rt3883_pci_controller *rpc;
unsigned long flags;
u32 address;
u32 data;
+ rpc = pci_bus_to_rt3883_controller(bus);
+
+ if (!rpc->pcie_ready && bus->number == 1)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
PCI_FUNC(devfn), where);
- spin_lock_irqsave(&rt3883_pci_lock, flags);
- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
- data = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
+ spin_lock_irqsave(&rpc->lock, flags);
+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
+ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
+ spin_unlock_irqrestore(&rpc->lock, flags);
switch (size) {
case 1:
@@ -232,16 +289,22 @@ static int rt3883_pci_config_read(struct
static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
+ struct rt3883_pci_controller *rpc;
unsigned long flags;
u32 address;
u32 data;
+ rpc = pci_bus_to_rt3883_controller(bus);
+
+ if (!rpc->pcie_ready && bus->number == 1)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
PCI_FUNC(devfn), where);
- spin_lock_irqsave(&rt3883_pci_lock, flags);
- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
- data = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
+ spin_lock_irqsave(&rpc->lock, flags);
+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
+ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
switch (size) {
case 1:
@@ -257,8 +320,8 @@ static int rt3883_pci_config_write(struc
break;
}
- rt3883_pci_wr(data, RT3883_PCI_REG_CONFIG_DATA);
- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
+ rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA);
+ spin_unlock_irqrestore(&rpc->lock, flags);
return PCIBIOS_SUCCESSFUL;
}
@@ -268,220 +331,310 @@ static struct pci_ops rt3883_pci_ops = {
.write = rt3883_pci_config_write,
};
-static struct resource rt3883_pci_mem_resource = {
- .name = "PCI MEM space",
- .start = RT3883_PCI_MEM_BASE,
- .end = RT3883_PCI_MEM_BASE + RT3883_PCI_MEM_SIZE - 1,
- .flags = IORESOURCE_MEM,
-};
-
-static struct resource rt3883_pci_io_resource = {
- .name = "PCI IO space",
- .start = RT3883_PCI_IO_BASE,
- .end = RT3883_PCI_IO_BASE + RT3883_PCI_IO_SIZE - 1,
- .flags = IORESOURCE_IO,
-};
-
-static struct pci_controller rt3883_pci_controller = {
- .pci_ops = &rt3883_pci_ops,
- .mem_resource = &rt3883_pci_mem_resource,
- .io_resource = &rt3883_pci_io_resource,
-};
-
-static void rt3883_pci_preinit(unsigned mode)
+static void rt3883_pci_preinit(struct rt3883_pci_controller *rpc, unsigned mode)
{
u32 syscfg1;
u32 rstctrl;
u32 clkcfg1;
+ u32 t;
+
+ rstctrl = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
+ syscfg1 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
+ clkcfg1 = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
if (mode & RT3883_PCI_MODE_PCIE) {
- u32 val;
+ rstctrl |= RT3883_RSTCTRL_PCIE;
+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
- val = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
- val &= ~(0x30);
- val |= (2 << 4);
- rt3883_sysc_wr(val, RT3883_SYSC_REG_SYSCFG1);
-
- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN0);
- val &= ~BIT(31);
- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN0);
-
- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN1);
- val &= 0x80ffffff;
- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN1);
-
- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN1);
- val |= 0xa << 24;
- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN1);
-
- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN0);
- val |= BIT(31);
- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN0);
+ /* setup PCI PAD drive mode */
+ syscfg1 &= ~(0x30);
+ syscfg1 |= (2 << 4);
+ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
+
+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
+ t &= ~BIT(31);
+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
+
+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
+ t &= 0x80ffffff;
+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
+
+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
+ t |= 0xa << 24;
+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
+
+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
+ t |= BIT(31);
+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
msleep(50);
+
+ rstctrl &= ~RT3883_RSTCTRL_PCIE;
+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
}
- syscfg1 = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
- syscfg1 &= ~(RT3883_SYSCFG1_PCIE_RC_MODE |
- RT3883_SYSCFG1_PCI_HOST_MODE);
-
- rstctrl = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
- rstctrl |= (RT3883_RSTCTRL_PCI | RT3883_RSTCTRL_PCIE);
-
- clkcfg1 = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
- clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN |
- RT3883_CLKCFG1_PCIE_CLK_EN);
+ syscfg1 |= (RT3883_SYSCFG1_PCIE_RC_MODE | RT3883_SYSCFG1_PCI_HOST_MODE);
+
+ clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN | RT3883_CLKCFG1_PCIE_CLK_EN);
if (mode & RT3883_PCI_MODE_PCI) {
- syscfg1 |= RT3883_SYSCFG1_PCI_HOST_MODE;
clkcfg1 |= RT3883_CLKCFG1_PCI_CLK_EN;
rstctrl &= ~RT3883_RSTCTRL_PCI;
}
+
if (mode & RT3883_PCI_MODE_PCIE) {
- syscfg1 |= RT3883_SYSCFG1_PCI_HOST_MODE |
- RT3883_SYSCFG1_PCIE_RC_MODE;
clkcfg1 |= RT3883_CLKCFG1_PCIE_CLK_EN;
rstctrl &= ~RT3883_RSTCTRL_PCIE;
}
- rt3883_sysc_wr(syscfg1, RT3883_SYSC_REG_SYSCFG1);
- rt3883_sysc_wr(rstctrl, RT3883_SYSC_REG_RSTCTRL);
- rt3883_sysc_wr(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
+ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
+ rt_sysc_w32(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
msleep(500);
-}
-static int rt3883_pcie_ready(void)
-{
- u32 status;
+ /*
+ * setup the device number of the P2P bridge
+ * and de-assert the reset line
+ */
+ t = (RT3883_P2P_BR_DEVNUM << RT3883_PCICFG_P2P_BR_DEVNUM_S);
+ rt3883_pci_w32(rpc, t, RT3883_PCI_REG_PCICFG);
+ /* flush write */
+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCICFG);
msleep(500);
- status = rt3883_pci_rr(RT3883_PCI_REG_STATUS(1));
- if (status & BIT(0))
- return 0;
+ if (mode & RT3883_PCI_MODE_PCIE) {
+ msleep(500);
+
+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_STATUS(1));
+
+ rpc->pcie_ready = t & BIT(0);
+
+ if (!rpc->pcie_ready) {
+ /* reset the PCIe block */
+ t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
+ t |= RT3883_RSTCTRL_PCIE;
+ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
+ t &= ~RT3883_RSTCTRL_PCIE;
+ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
+
+ /* turn off PCIe clock */
+ t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
+ t &= ~RT3883_CLKCFG1_PCIE_CLK_EN;
+ rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
+
+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
+ t &= ~0xf000c080;
+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
+ }
+ }
+
+ /* enable PCI arbiter */
+ rt3883_pci_w32(rpc, 0x79, RT3883_PCI_REG_ARBCTL);
+}
- /* TODO: reset PCIe and turn off PCIe clock */
+static inline void
+rt3883_dump_pci_config(struct rt3883_pci_controller *rpc,
+ int bus, int slot)
+{
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ u32 val;
- return -ENODEV;
+ val = rt3883_pci_read_cfg32(rpc, bus, slot, 0, i << 2);
+ pr_info("pci %02x:%02x.0 0x%02x = %08x\n",
+ bus, slot, i << 2, val);
+ }
}
-void __init rt3883_pci_init(unsigned mode)
+static int rt3883_pci_probe(struct platform_device *pdev)
{
+ struct rt3883_pci_controller *rpc;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct resource *res;
+ struct device_node *child;
u32 val;
int err;
+ int mode;
- rt3883_pci_preinit(mode);
+ rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);
+ if (!rpc)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ rpc->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(rpc->base))
+ return PTR_ERR(rpc->base);
+
+ rpc->pci_controller.of_node = of_get_child_by_name(np, "host-bridge");
+ if (!rpc->pci_controller.of_node) {
+ dev_err(dev, "no %s child node found", "host-bridge");
+ return -ENODEV;
+ }
+
+ mode = RT3883_PCI_MODE_NONE;
+ for_each_child_of_node(rpc->pci_controller.of_node, child) {
+ u32 slot;
+
+ if (!of_device_is_available(child))
+ continue;
+
+ if (of_property_read_u32(child, "ralink,pci-slot",
+ &slot)) {
+ dev_err(dev, "no '%s' property found for %s\n",
+ "ralink,pci-slot",
+ of_node_full_name(child));
+ continue;
+ }
- rt3883_pci_base = ioremap(RT3883_PCI_BASE, PAGE_SIZE);
- if (rt3883_pci_base == NULL) {
- pr_err("failed to ioremap PCI registers\n");
- return;
+ switch (slot) {
+ case 1:
+ mode |= RT3883_PCI_MODE_PCIE;
+ break;
+
+ case 17:
+ case 18:
+ mode |= RT3883_PCI_MODE_PCI;
+ break;
+ }
}
- rt3883_pci_wr(0, RT3883_PCI_REG_PCICFG_ADDR);
- if (mode & RT3883_PCI_MODE_PCI)
- rt3883_pci_wr(BIT(16), RT3883_PCI_REG_PCICFG_ADDR);
+ if (mode == RT3883_PCI_MODE_NONE) {
+ dev_err(dev, "unable to determine PCI mode\n");
+ err = -EINVAL;
+ goto err_put_hb_node;
+ }
- msleep(500);
+ dev_info(dev, "mode:%s%s\n",
+ (mode & RT3883_PCI_MODE_PCI) ? " PCI" : "",
+ (mode & RT3883_PCI_MODE_PCIE) ? " PCIe" : "");
- if (mode & RT3883_PCI_MODE_PCIE) {
- err = rt3883_pcie_ready();
- if (err)
- return;
- }
+ rt3883_pci_preinit(rpc, mode);
- if (mode & RT3883_PCI_MODE_PCI)
- rt3883_pci_wr(0x79, RT3883_PCI_REG_ARBCTL);
+ rpc->pci_controller.pci_ops = &rt3883_pci_ops;
+ rpc->pci_controller.io_resource = &rpc->io_res;
+ rpc->pci_controller.mem_resource = &rpc->mem_res;
- rt3883_pci_wr(RT3883_PCI_MEM_BASE, RT3883_PCI_REG_MEMBASE);
- rt3883_pci_wr(RT3883_PCI_IO_BASE, RT3883_PCI_REG_IOBASE);
+ /* Load PCI I/O and memory resources from DT */
+ pci_load_of_ranges(&rpc->pci_controller,
+ rpc->pci_controller.of_node);
+
+ rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);
+ rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);
+
+ ioport_resource.start = rpc->io_res.start;
+ ioport_resource.end = rpc->io_res.end;
/* PCI */
- rt3883_pci_wr(0x03ff0000, RT3883_PCI_REG_BAR0SETUP_ADDR(0));
- rt3883_pci_wr(RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0_ADDR(0));
- rt3883_pci_wr(0x08021814, RT3883_PCI_REG_ID(0));
- rt3883_pci_wr(0x00800001, RT3883_PCI_REG_CLASS(0));
- rt3883_pci_wr(0x28801814, RT3883_PCI_REG_SUBID(0));
+ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(0));
+ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(0));
+ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(0));
+ rt3883_pci_w32(rpc, 0x00800001, RT3883_PCI_REG_CLASS(0));
+ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(0));
/* PCIe */
- rt3883_pci_wr(0x01ff0000, RT3883_PCI_REG_BAR0SETUP_ADDR(1));
- rt3883_pci_wr(RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0_ADDR(1));
- rt3883_pci_wr(0x08021814, RT3883_PCI_REG_ID(1));
- rt3883_pci_wr(0x06040001, RT3883_PCI_REG_CLASS(1));
- rt3883_pci_wr(0x28801814, RT3883_PCI_REG_SUBID(1));
-
- rt3883_pci_irq_init();
+ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(1));
+ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(1));
+ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(1));
+ rt3883_pci_w32(rpc, 0x06040001, RT3883_PCI_REG_CLASS(1));
+ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(1));
+
+ err = rt3883_pci_irq_init(dev, rpc);
+ if (err)
+ goto err_put_hb_node;
/* PCIe */
- val = rt3883_pci_read_u32(0, 0x01, 0, PCI_COMMAND);
- val |= 0x7;
- rt3883_pci_write_u32(0, 0x01, 0, PCI_COMMAND, val);
+ val = rt3883_pci_read_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND);
+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ rt3883_pci_write_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND, val);
/* PCI */
- val = rt3883_pci_read_u32(0, 0x00, 0, PCI_COMMAND);
- val |= 0x7;
- rt3883_pci_write_u32(0, 0x00, 0, PCI_COMMAND, val);
+ val = rt3883_pci_read_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND);
+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ rt3883_pci_write_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND, val);
+
+ if (mode == RT3883_PCI_MODE_PCIE) {
+ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(0));
+ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(1));
+
+ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
+ PCI_BASE_ADDRESS_0,
+ RT3883_MEMORY_BASE);
+ /* flush write */
+ rt3883_pci_read_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
+ PCI_BASE_ADDRESS_0);
+ } else {
+ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
+ PCI_IO_BASE, 0x00000101);
+ }
+
+ register_pci_controller(&rpc->pci_controller);
- ioport_resource.start = rt3883_pci_io_resource.start;
- ioport_resource.end = rt3883_pci_io_resource.end;
+ return 0;
- register_pci_controller(&rt3883_pci_controller);
+err_put_hb_node:
+ of_node_put(rpc->pci_controller.of_node);
+ return err;
}
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
- int irq = -1;
-
- switch (dev->bus->number) {
- case 0:
- switch (PCI_SLOT(dev->devfn)) {
- case 0x00:
- rt3883_pci_wr(0x03ff0001,
- RT3883_PCI_REG_BAR0SETUP_ADDR(0));
- rt3883_pci_wr(0x03ff0001,
- RT3883_PCI_REG_BAR0SETUP_ADDR(1));
-
- rt3883_pci_write_u32(0, 0x00, 0, PCI_BASE_ADDRESS_0,
- RT3883_MEMORY_BASE);
- rt3883_pci_read_u32(0, 0x00, 0, PCI_BASE_ADDRESS_0);
-
- irq = RT3883_CPU_IRQ_PCI;
- break;
- case 0x01:
- rt3883_pci_write_u32(0, 0x01, 0, PCI_IO_BASE,
- 0x00000101);
- break;
- case 0x11:
- irq = RT3883_PCI_IRQ_PCI0;
- break;
- case 0x12:
- irq = RT3883_PCI_IRQ_PCI1;
- break;
- }
- break;
-
- case 1:
- irq = RT3883_PCI_IRQ_PCIE;
- break;
+ struct rt3883_pci_controller *rpc;
+ struct of_irq dev_irq;
+ int err;
+ int irq;
- default:
- dev_err(&dev->dev, "no IRQ specified\n");
- return irq;
+ rpc = pci_bus_to_rt3883_controller(dev->bus);
+ err = of_irq_map_pci(dev, &dev_irq);
+ if (err) {
+ pr_err("pci %s: unable to get irq map, err=%d\n",
+ pci_name((struct pci_dev *) dev), err);
+ return 0;
}
+ irq = irq_create_of_mapping(dev_irq.controller,
+ dev_irq.specifier,
+ dev_irq.size);
+
+ if (irq == 0)
+ pr_crit("pci %s: no irq found for pin %u\n",
+ pci_name((struct pci_dev *) dev), pin);
+ else
+ pr_info("pci %s: using irq %d for pin %u\n",
+ pci_name((struct pci_dev *) dev), irq, pin);
+
return irq;
}
-void __init rt3883_pci_set_plat_dev_init(int (*f)(struct pci_dev *dev))
+int pcibios_plat_dev_init(struct pci_dev *dev)
{
- rt3883_pci_plat_dev_init = f;
+ return 0;
}
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- if (rt3883_pci_plat_dev_init)
- return rt3883_pci_plat_dev_init(dev);
+static const struct of_device_id rt3883_pci_ids[] = {
+ { .compatible = "ralink,rt3883-pci" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, rt3883_pci_ids);
- return 0;
+static struct platform_driver rt3883_pci_driver = {
+ .probe = rt3883_pci_probe,
+ .driver = {
+ .name = "rt3883-pci",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(rt3883_pci_ids),
+ },
+};
+
+static int __init rt3883_pci_init(void)
+{
+ return platform_driver_register(&rt3883_pci_driver);
}
+
+postcore_initcall(rt3883_pci_init);