From b80a5236053be899421417871d1be8016912e94b Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 3 Aug 2012 09:52:10 +0200
Subject: [PATCH 05/25] pci support
---
arch/mips/include/asm/mach-lantiq/lantiq.h | 37 ++++-----
.../mips/include/asm/mach-lantiq/lantiq_platform.h | 9 ++
arch/mips/pci/Makefile | 5 +-
arch/mips/pci/ops-lantiq.c | 6 +-
arch/mips/pci/pci-lantiq.c | 82 ++++++++------------
arch/mips/pci/pci-lantiq.h | 2 +-
arch/mips/pci/pci.c | 25 ++++++
7 files changed, 89 insertions(+), 77 deletions(-)
diff --git a/arch/mips/include/asm/mach-lantiq/lantiq.h b/arch/mips/include/asm/mach-lantiq/lantiq.h
index ce2f029..622847f 100644
--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
@@ -9,6 +9,8 @@
#define _LANTIQ_H__
#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/ioport.h>
/* generic reg access functions */
#define ltq_r32(reg) __raw_readl(reg)
@@ -18,40 +20,33 @@
#define ltq_r8(reg) __raw_readb(reg)
#define ltq_w8(val, reg) __raw_writeb(val, reg)
-/* register access macros for EBU and CGU */
-#define ltq_ebu_w32(x, y) ltq_w32((x), ltq_ebu_membase + (y))
-#define ltq_ebu_r32(x) ltq_r32(ltq_ebu_membase + (x))
-#define ltq_cgu_w32(x, y) ltq_w32((x), ltq_cgu_membase + (y))
-#define ltq_cgu_r32(x) ltq_r32(ltq_cgu_membase + (x))
-
-extern __iomem void *ltq_ebu_membase;
-extern __iomem void *ltq_cgu_membase;
-
extern unsigned int ltq_get_cpu_ver(void);
extern unsigned int ltq_get_soc_type(void);
-/* clock speeds */
-#define CLOCK_60M 60000000
-#define CLOCK_83M 83333333
-#define CLOCK_111M 111111111
-#define CLOCK_133M 133333333
-#define CLOCK_167M 166666667
-#define CLOCK_200M 200000000
-#define CLOCK_266M 266666666
-#define CLOCK_333M 333333333
-#define CLOCK_400M 400000000
-
/* spinlock all ebu i/o */
extern spinlock_t ebu_lock;
+/* request a non-gpio and set the PIO config */
+extern int ltq_gpio_request(struct device *dev, unsigned int pin,
+ unsigned int mux, unsigned int dir, const char *name);
+
/* some irq helpers */
extern void ltq_disable_irq(struct irq_data *data);
extern void ltq_mask_and_ack_irq(struct irq_data *data);
extern void ltq_enable_irq(struct irq_data *data);
+/* clock handling */
+extern int clk_activate(struct clk *clk);
+extern void clk_deactivate(struct clk *clk);
+extern struct clk *clk_get_cpu(void);
+extern struct clk *clk_get_fpi(void);
+extern struct clk *clk_get_io(void);
+
/* find out what caused the last cpu reset */
extern int ltq_reset_cause(void);
-#define LTQ_RST_CAUSE_WDTRST 0x20
+
+/* helper for requesting and remapping resources */
+extern void __iomem *ltq_remap_resource(struct resource *res);
#define IOPORT_RESOURCE_START 0x10000000
#define IOPORT_RESOURCE_END 0xffffffff
diff --git a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
index a305f1d..38ed938 100644
--- a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
@@ -50,4 +50,13 @@ struct ltq_eth_data {
int mii_mode;
};
+
+struct ltq_spi_platform_data {
+ u16 num_chipselect;
+};
+
+struct ltq_spi_controller_data {
+ unsigned gpio;
+};
+
#endif
diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile
index c3ac4b0..31e70c5 100644
--- a/arch/mips/pci/Makefile
+++ b/arch/mips/pci/Makefile
@@ -41,7 +41,10 @@ obj-$(CONFIG_SIBYTE_SB1250) += fixup-sb1250.o pci-sb1250.o
obj-$(CONFIG_SIBYTE_BCM112X) += fixup-sb1250.o pci-sb1250.o
obj-$(CONFIG_SIBYTE_BCM1x80) += pci-bcm1480.o pci-bcm1480ht.o
obj-$(CONFIG_SNI_RM) += fixup-sni.o ops-sni.o
-obj-$(CONFIG_SOC_XWAY) += pci-lantiq.o ops-lantiq.o
+obj-$(CONFIG_LANTIQ) += fixup-lantiq.o
+obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o ops-lantiq.o
+obj-$(CONFIG_PCIE_LANTIQ) += pcie-lantiq-phy.o pcie-lantiq.o fixup-lantiq-pcie.o
+obj-$(CONFIG_PCIE_LANTIQ_MSI) += pcie-lantiq-msi.o
obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o
obj-$(CONFIG_TANBAC_TB0287) += fixup-tb0287.o
diff --git a/arch/mips/pci/ops-lantiq.c b/arch/mips/pci/ops-lantiq.c
index 1f2afb5..5cbb0cf 100644
--- a/arch/mips/pci/ops-lantiq.c
+++ b/arch/mips/pci/ops-lantiq.c
@@ -41,7 +41,7 @@ static int ltq_pci_config_access(unsigned char access_type, struct pci_bus *bus,
spin_lock_irqsave(&ebu_lock, flags);
- cfg_base = (unsigned long) ltq_pci_mapped_cfg;
+ cfg_base = (unsigned long) ltq_pci_cfgbase;
cfg_base |= (bus->number << LTQ_PCI_CFG_BUSNUM_SHF) | (devfn <<
LTQ_PCI_CFG_FUNNUM_SHF) | (where & ~0x3);
@@ -55,11 +55,11 @@ static int ltq_pci_config_access(unsigned char access_type, struct pci_bus *bus,
wmb();
/* clean possible Master abort */
- cfg_base = (unsigned long) ltq_pci_mapped_cfg;
+ cfg_base = (unsigned long) ltq_pci_cfgbase;
cfg_base |= (0x0 << LTQ_PCI_CFG_FUNNUM_SHF) + 4;
temp = ltq_r32(((u32 *)(cfg_base)));
temp = swab32(temp);
- cfg_base = (unsigned long) ltq_pci_mapped_cfg;
+ cfg_base = (unsigned long) ltq_pci_cfgbase;
cfg_base |= (0x68 << LTQ_PCI_CFG_FUNNUM_SHF) + 4;
ltq_w32(temp, ((u32 *)cfg_base));
diff --git a/arch/mips/pci/pci-lantiq.c b/arch/mips/pci/pci-lantiq.c
index be1e1af..7a29738 100644
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -65,45 +65,42 @@
#define ltq_pci_w32(x, y) ltq_w32((x), ltq_pci_membase + (y))
#define ltq_pci_r32(x) ltq_r32(ltq_pci_membase + (x))
-#define ltq_pci_cfg_w32(x, y) ltq_w32((x), ltq_pci_mapped_cfg + (y))
-#define ltq_pci_cfg_r32(x) ltq_r32(ltq_pci_mapped_cfg + (x))
+#define ltq_pci_cfg_w32(x, y) ltq_w32((x), ltq_pci_cfgbase + (y))
+#define ltq_pci_cfg_r32(x) ltq_r32(ltq_pci_cfgbase + (x))
struct ltq_pci_gpio_map {
int pin;
- int alt0;
- int alt1;
+ int mux;
int dir;
char *name;
};
/* the pci core can make use of the following gpios */
static struct ltq_pci_gpio_map ltq_pci_gpio_map[] = {
- { 0, 1, 0, 0, "pci-exin0" },
- { 1, 1, 0, 0, "pci-exin1" },
- { 2, 1, 0, 0, "pci-exin2" },
- { 39, 1, 0, 0, "pci-exin3" },
- { 10, 1, 0, 0, "pci-exin4" },
- { 9, 1, 0, 0, "pci-exin5" },
- { 30, 1, 0, 1, "pci-gnt1" },
- { 23, 1, 0, 1, "pci-gnt2" },
- { 19, 1, 0, 1, "pci-gnt3" },
- { 38, 1, 0, 1, "pci-gnt4" },
- { 29, 1, 0, 0, "pci-req1" },
- { 31, 1, 0, 0, "pci-req2" },
- { 3, 1, 0, 0, "pci-req3" },
- { 37, 1, 0, 0, "pci-req4" },
+ { 0, 2, 0, "pci-exin0" },
+ { 1, 2, 0, "pci-exin1" },
+ { 2, 1, 0, "pci-exin2" },
+ { 39, 2, 0, "pci-exin3" },
+ { 10, 2, 0, "pci-exin4" },
+ { 9, 2, 0, "pci-exin5" },
+ { 30, 2, 1, "pci-gnt1" },
+ { 23, 1, 1, "pci-gnt2" },
+ { 19, 2, 1, "pci-gnt3" },
+ { 38, 2, 1, "pci-gnt4" },
+ { 29, 2, 0, "pci-req1" },
+ { 31, 1, 0, "pci-req2" },
+ { 3, 3, 0, "pci-req3" },
+ { 37, 2, 0, "pci-req4" },
};
-__iomem void *ltq_pci_mapped_cfg;
+__iomem void *ltq_pci_cfgbase;
static __iomem void *ltq_pci_membase;
-int (*ltqpci_plat_dev_init)(struct pci_dev *dev) = NULL;
-
/* Since the PCI REQ pins can be reused for other functionality, make it
possible to exclude those from interpretation by the PCI controller */
static int ltq_pci_req_mask = 0xf;
-static int *ltq_pci_irq_map;
+extern int *ltq_pci_irq_map;
struct pci_ops ltq_pci_ops = {
.read = ltq_pci_read_config_dword,
@@ -132,14 +129,6 @@ static struct pci_controller ltq_pci_controller = {
.io_offset = 0x00000000UL,
};
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- if (ltqpci_plat_dev_init)
- return ltqpci_plat_dev_init(dev);
-
- return 0;
-}
-
static u32 ltq_calc_bar11mask(void)
{
u32 mem, bar11mask;
@@ -151,25 +140,26 @@ static u32 ltq_calc_bar11mask(void)
return bar11mask;
}
-static void ltq_pci_setup_gpio(int gpio)
+static void ltq_pci_setup_gpio(struct device *dev)
{
+ struct ltq_pci_data *conf = (struct ltq_pci_data *) dev->platform_data;
int i;
for (i = 0; i < ARRAY_SIZE(ltq_pci_gpio_map); i++) {
- if (gpio & (1 << i)) {
- ltq_gpio_request(ltq_pci_gpio_map[i].pin,
- ltq_pci_gpio_map[i].alt0,
- ltq_pci_gpio_map[i].alt1,
+ if (conf->gpio & (1 << i)) {
+ ltq_gpio_request(dev, ltq_pci_gpio_map[i].pin,
+ ltq_pci_gpio_map[i].mux,
ltq_pci_gpio_map[i].dir,
ltq_pci_gpio_map[i].name);
}
}
- ltq_gpio_request(21, 0, 0, 1, "pci-reset");
- ltq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
+ ltq_gpio_request(dev, 21, 0, 1, "pci-reset");
+ ltq_pci_req_mask = (conf->gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
}
-static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
+static int __devinit ltq_pci_startup(struct device *dev)
{
u32 temp_buffer;
+ struct ltq_pci_data *conf = (struct ltq_pci_data *) dev->platform_data;
/* set clock to 33Mhz */
if (ltq_is_ar9()) {
@@ -192,7 +182,7 @@ static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
}
/* setup pci clock and gpis used by pci */
- ltq_pci_setup_gpio(conf->gpio);
+ ltq_pci_setup_gpio(dev);
/* enable auto-switching between PCI and EBU */
ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);
@@ -256,16 +246,6 @@ static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
return 0;
}
-int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- if (ltq_pci_irq_map[slot])
- return ltq_pci_irq_map[slot];
- printk(KERN_ERR "lq_pci: trying to map irq for unknown slot %d\n",
- slot);
-
- return 0;
-}
-
static int __devinit ltq_pci_probe(struct platform_device *pdev)
{
struct ltq_pci_data *ltq_pci_data =
@@ -273,11 +253,11 @@ static int __devinit ltq_pci_probe(struct platform_device *pdev)
pci_probe_only = 0;
ltq_pci_irq_map = ltq_pci_data->irq;
ltq_pci_membase = ioremap_nocache(PCI_CR_BASE_ADDR, PCI_CR_SIZE);
- ltq_pci_mapped_cfg =
+ ltq_pci_cfgbase =
ioremap_nocache(LTQ_PCI_CFG_BASE, LTQ_PCI_CFG_BASE);
ltq_pci_controller.io_map_base =
(unsigned long)ioremap(LTQ_PCI_IO_BASE, LTQ_PCI_IO_SIZE - 1);
- ltq_pci_startup(ltq_pci_data);
+ ltq_pci_startup(&pdev->dev);
register_pci_controller(<q_pci_controller);
return 0;
diff --git a/arch/mips/pci/pci-lantiq.h b/arch/mips/pci/pci-lantiq.h
index 66bf6cd..c4721b4 100644
--- a/arch/mips/pci/pci-lantiq.h
+++ b/arch/mips/pci/pci-lantiq.h
@@ -9,7 +9,7 @@
#ifndef _LTQ_PCI_H__
#define _LTQ_PCI_H__
-extern __iomem void *ltq_pci_mapped_cfg;
+extern __iomem void *ltq_pci_cfgbase;
extern int ltq_pci_read_config_dword(struct pci_bus *bus,
unsigned int devfn, int where, int size, u32 *val);
extern int ltq_pci_write_config_dword(struct pci_bus *bus,
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 1552150..cd034a9 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -201,6 +201,31 @@ static int __init pcibios_init(void)
subsys_initcall(pcibios_init);
+int pcibios_host_nr(void)
+{
+ int count;
+ struct pci_controller *hose;
+ for (count = 0, hose = hose_head; hose; hose = hose->next, count++) {
+ ;
+ }
+ return count;
+}
+EXPORT_SYMBOL(pcibios_host_nr);
+
+int pcibios_1st_host_bus_nr(void)
+{
+ int bus_nr = 0;
+ struct pci_controller *hose = hose_head;
+
+ if (hose != NULL) {
+ if (hose->bus != NULL) {
+ bus_nr = hose->bus->subordinate + 1;
+ }
+ }
+ return bus_nr;
+}
+EXPORT_SYMBOL(pcibios_1st_host_bus_nr);
+
static int pcibios_enable_resources(struct pci_dev *dev, int mask)
{
u16 cmd, old_cmd;
--
1.7.9.1