mirror of https://github.com/hak5/openwrt.git
390 lines
11 KiB
Diff
390 lines
11 KiB
Diff
--- a/arch/arm/Kconfig
|
|
+++ b/arch/arm/Kconfig
|
|
@@ -388,6 +388,7 @@ config ARCH_GEMINI
|
|
select ARCH_USES_GETTIMEOFFSET
|
|
select NEED_MACH_GPIO_H
|
|
select CPU_FA526
|
|
+ select MIGHT_HAVE_PCI
|
|
help
|
|
Support for the Cortina Systems Gemini family SoCs
|
|
|
|
--- a/arch/arm/mach-gemini/include/mach/hardware.h
|
|
+++ b/arch/arm/mach-gemini/include/mach/hardware.h
|
|
@@ -71,4 +71,9 @@
|
|
*/
|
|
#define IO_ADDRESS(x) IOMEM((((x) & 0xFFF00000) >> 4) | ((x) & 0x000FFFFF) | 0xF0000000)
|
|
|
|
+/*
|
|
+ * PCI subsystem macros
|
|
+ */
|
|
+#define pcibios_assign_all_busses() 1
|
|
+
|
|
#endif
|
|
--- a/arch/arm/mach-gemini/include/mach/irqs.h
|
|
+++ b/arch/arm/mach-gemini/include/mach/irqs.h
|
|
@@ -43,11 +43,14 @@
|
|
|
|
#define NORMAL_IRQ_NUM 32
|
|
|
|
-#define GPIO_IRQ_BASE NORMAL_IRQ_NUM
|
|
+#define PCI_IRQ_BASE NORMAL_IRQ_NUM
|
|
+#define PCI_IRQ_NUM 4
|
|
+
|
|
+#define GPIO_IRQ_BASE (NORMAL_IRQ_NUM + PCI_IRQ_NUM)
|
|
#define GPIO_IRQ_NUM (3 * 32)
|
|
|
|
#define ARCH_TIMER_IRQ IRQ_TIMER2
|
|
|
|
-#define NR_IRQS (NORMAL_IRQ_NUM + GPIO_IRQ_NUM)
|
|
+#define NR_IRQS (NORMAL_IRQ_NUM + PCI_IRQ_NUM + GPIO_IRQ_NUM)
|
|
|
|
#endif /* __MACH_IRQS_H__ */
|
|
--- a/arch/arm/mach-gemini/Makefile
|
|
+++ b/arch/arm/mach-gemini/Makefile
|
|
@@ -6,6 +6,8 @@
|
|
|
|
obj-y := irq.o mm.o time.o devices.o gpio.o idle.o reset.o
|
|
|
|
+obj-$(CONFIG_PCI) += pci.o
|
|
+
|
|
# Board-specific support
|
|
obj-$(CONFIG_MACH_NAS4220B) += board-nas4220b.o
|
|
obj-$(CONFIG_MACH_RUT100) += board-rut1xx.o
|
|
--- a/arch/arm/mach-gemini/mm.c
|
|
+++ b/arch/arm/mach-gemini/mm.c
|
|
@@ -59,6 +59,11 @@ static struct map_desc gemini_io_desc[]
|
|
.length = SZ_512K,
|
|
.type = MT_DEVICE,
|
|
}, {
|
|
+ .virtual = (unsigned long)IO_ADDRESS(GEMINI_PCI_IO_BASE),
|
|
+ .pfn = __phys_to_pfn(GEMINI_PCI_IO_BASE),
|
|
+ .length = SZ_512K,
|
|
+ .type = MT_DEVICE,
|
|
+ }, {
|
|
.virtual = (unsigned long)IO_ADDRESS(GEMINI_FLASH_CTRL_BASE),
|
|
.pfn = __phys_to_pfn(GEMINI_FLASH_CTRL_BASE),
|
|
.length = SZ_512K,
|
|
--- /dev/null
|
|
+++ b/arch/arm/mach-gemini/pci.c
|
|
@@ -0,0 +1,320 @@
|
|
+/*
|
|
+ * Support for Gemini PCI Controller
|
|
+ *
|
|
+ * Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
|
|
+ * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
|
|
+ *
|
|
+ * based on SL2312 PCI controller code
|
|
+ * Storlink (C) 2003
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License as published by
|
|
+ * the Free Software Foundation; either version 2 of the License, or
|
|
+ * (at your option) any later version.
|
|
+ */
|
|
+
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/pci.h>
|
|
+#include <linux/irq.h>
|
|
+#include <linux/gpio.h>
|
|
+
|
|
+#include <asm/mach/pci.h>
|
|
+
|
|
+#include <mach/irqs.h>
|
|
+#include <mach/hardware.h>
|
|
+
|
|
+#define GEMINI_PCI_IOSIZE_1M 0x0000
|
|
+
|
|
+#define GEMINI_PCI_PMC 0x40
|
|
+#define GEMINI_PCI_PMCSR 0x44
|
|
+#define GEMINI_PCI_CTRL1 0x48
|
|
+#define GEMINI_PCI_CTRL2 0x4C
|
|
+#define GEMINI_PCI_MEM1_BASE_SIZE 0x50
|
|
+#define GEMINI_PCI_MEM2_BASE_SIZE 0x54
|
|
+#define GEMINI_PCI_MEM3_BASE_SIZE 0x58
|
|
+
|
|
+#define PCI_CTRL2_INTSTS_OFFSET 28
|
|
+#define PCI_CTRL2_INTMASK_OFFSET 22
|
|
+
|
|
+#define GEMINI_PCI_DMA_MASK 0xFFF00000
|
|
+#define GEMINI_PCI_DMA_MEM1_BASE 0x00000000
|
|
+#define GEMINI_PCI_DMA_MEM2_BASE 0x00000000
|
|
+#define GEMINI_PCI_DMA_MEM3_BASE 0x00000000
|
|
+#define GEMINI_PCI_DMA_MEM1_SIZE 7
|
|
+#define GEMINI_PCI_DMA_MEM2_SIZE 6
|
|
+#define GEMINI_PCI_DMA_MEM3_SIZE 6
|
|
+
|
|
+#define PCI_CONF_ENABLE (1 << 31)
|
|
+#define PCI_CONF_WHERE(r) ((r) & 0xFC)
|
|
+#define PCI_CONF_BUS(b) (((b) & 0xFF) << 16)
|
|
+#define PCI_CONF_DEVICE(d) (((d) & 0x1F) << 11)
|
|
+#define PCI_CONF_FUNCTION(f) (((f) & 0x07) << 8)
|
|
+
|
|
+#define PCI_IOSIZE_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE))
|
|
+#define PCI_PROT_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x04)
|
|
+#define PCI_CTRL_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x08)
|
|
+#define PCI_SOFTRST_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x10)
|
|
+#define PCI_CONFIG_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x28)
|
|
+#define PCI_DATA_REG (IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x2C)
|
|
+
|
|
+
|
|
+static DEFINE_SPINLOCK(gemini_pci_lock);
|
|
+
|
|
+static int gemini_pci_read_config(struct pci_bus* bus, unsigned int fn,
|
|
+ int config, int size, u32* value)
|
|
+{
|
|
+ unsigned long irq_flags;
|
|
+
|
|
+ spin_lock_irqsave(&gemini_pci_lock, irq_flags);
|
|
+
|
|
+ __raw_writel(PCI_CONF_BUS(bus->number) |
|
|
+ PCI_CONF_DEVICE(PCI_SLOT(fn)) |
|
|
+ PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
|
|
+ PCI_CONF_WHERE(config) |
|
|
+ PCI_CONF_ENABLE,
|
|
+ PCI_CONFIG_REG);
|
|
+
|
|
+ *value = __raw_readl(PCI_DATA_REG);
|
|
+
|
|
+ if (size == 1)
|
|
+ *value = (*value >> (8 * (config & 3))) & 0xFF;
|
|
+ else if (size == 2)
|
|
+ *value = (*value >> (8 * (config & 3))) & 0xFFFF;
|
|
+
|
|
+ spin_unlock_irqrestore(&gemini_pci_lock, irq_flags);
|
|
+
|
|
+ dev_dbg(&bus->dev,
|
|
+ "[read] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
|
|
+ PCI_SLOT(fn), PCI_FUNC(fn), config, size, *value);
|
|
+
|
|
+ return PCIBIOS_SUCCESSFUL;
|
|
+}
|
|
+
|
|
+static int gemini_pci_write_config(struct pci_bus* bus, unsigned int fn,
|
|
+ int config, int size, u32 value)
|
|
+{
|
|
+ unsigned long irq_flags = 0;
|
|
+ int ret = PCIBIOS_SUCCESSFUL;
|
|
+
|
|
+ dev_dbg(&bus->dev,
|
|
+ "[write] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
|
|
+ PCI_SLOT(fn), PCI_FUNC(fn), config, size, value);
|
|
+
|
|
+ spin_lock_irqsave(&gemini_pci_lock, irq_flags);
|
|
+
|
|
+ __raw_writel(PCI_CONF_BUS(bus->number) |
|
|
+ PCI_CONF_DEVICE(PCI_SLOT(fn)) |
|
|
+ PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
|
|
+ PCI_CONF_WHERE(config) |
|
|
+ PCI_CONF_ENABLE,
|
|
+ PCI_CONFIG_REG);
|
|
+
|
|
+ switch(size) {
|
|
+ case 4:
|
|
+ __raw_writel(value, PCI_DATA_REG);
|
|
+ break;
|
|
+ case 2:
|
|
+ __raw_writew(value, PCI_DATA_REG + (config & 3));
|
|
+ break;
|
|
+ case 1:
|
|
+ __raw_writeb(value, PCI_DATA_REG + (config & 3));
|
|
+ break;
|
|
+ default:
|
|
+ ret = PCIBIOS_BAD_REGISTER_NUMBER;
|
|
+ }
|
|
+
|
|
+ spin_unlock_irqrestore(&gemini_pci_lock, irq_flags);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static struct pci_ops gemini_pci_ops = {
|
|
+ .read = gemini_pci_read_config,
|
|
+ .write = gemini_pci_write_config,
|
|
+};
|
|
+
|
|
+static struct resource gemini_pci_resource_io = {
|
|
+ .name = "PCI I/O Space",
|
|
+ .start = GEMINI_PCI_IO_BASE,
|
|
+ .end = GEMINI_PCI_IO_BASE + SZ_1M - 1,
|
|
+ .flags = IORESOURCE_IO,
|
|
+};
|
|
+
|
|
+static struct resource gemini_pci_resource_mem = {
|
|
+ .name = "PCI Memory Space",
|
|
+ .start = GEMINI_PCI_MEM_BASE,
|
|
+ .end = GEMINI_PCI_MEM_BASE + SZ_128M - 1,
|
|
+ .flags = IORESOURCE_MEM,
|
|
+};
|
|
+
|
|
+static int __init gemini_pci_request_resources(struct pci_sys_data *sys)
|
|
+{
|
|
+ if (request_resource(&ioport_resource, &gemini_pci_resource_io))
|
|
+ goto bad_resources;
|
|
+ if (request_resource(&iomem_resource, &gemini_pci_resource_mem))
|
|
+ goto bad_resources;
|
|
+
|
|
+ pci_add_resource(&sys->resources, &gemini_pci_resource_io);
|
|
+ pci_add_resource(&sys->resources, &gemini_pci_resource_mem);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+bad_resources:
|
|
+ pr_err("Gemini PCI: request_resource() failed. "
|
|
+ "Abort PCI bus enumeration.\n");
|
|
+ return -1;
|
|
+}
|
|
+
|
|
+static int __init gemini_pci_setup(int nr, struct pci_sys_data *sys)
|
|
+{
|
|
+ unsigned int cmd;
|
|
+
|
|
+ pcibios_min_io = 0x100;
|
|
+ pcibios_min_mem = 0;
|
|
+
|
|
+ if ((nr > 0) || gemini_pci_request_resources(sys))
|
|
+ return 0;
|
|
+
|
|
+ /* setup I/O space to 1MB size */
|
|
+ __raw_writel(GEMINI_PCI_IOSIZE_1M, PCI_IOSIZE_REG);
|
|
+
|
|
+ /* setup hostbridge */
|
|
+ cmd = __raw_readl(PCI_CTRL_REG);
|
|
+ cmd |= PCI_COMMAND_IO;
|
|
+ cmd |= PCI_COMMAND_MEMORY;
|
|
+ cmd |= PCI_COMMAND_MASTER;
|
|
+ __raw_writel(cmd, PCI_CTRL_REG);
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static struct pci_bus* __init gemini_pci_scan_bus(int nr, struct pci_sys_data* sys)
|
|
+{
|
|
+ unsigned int reg = 0;
|
|
+ struct pci_bus* bus = 0;
|
|
+
|
|
+ bus = pci_scan_bus(nr, &gemini_pci_ops, sys);
|
|
+ if (bus) {
|
|
+ dev_dbg(&bus->dev, "setting up PCI DMA\n");
|
|
+ reg = (GEMINI_PCI_DMA_MEM1_BASE & GEMINI_PCI_DMA_MASK)
|
|
+ | (GEMINI_PCI_DMA_MEM1_SIZE << 16);
|
|
+ gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM1_BASE_SIZE, 4, reg);
|
|
+ reg = (GEMINI_PCI_DMA_MEM2_BASE & GEMINI_PCI_DMA_MASK)
|
|
+ | (GEMINI_PCI_DMA_MEM2_SIZE << 16);
|
|
+ gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM2_BASE_SIZE, 4, reg);
|
|
+ reg = (GEMINI_PCI_DMA_MEM3_BASE & GEMINI_PCI_DMA_MASK)
|
|
+ | (GEMINI_PCI_DMA_MEM3_SIZE << 16);
|
|
+ gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM3_BASE_SIZE, 4, reg);
|
|
+ }
|
|
+
|
|
+ return bus;
|
|
+}
|
|
+
|
|
+/* Should work with all boards based on original Storlink EVB */
|
|
+static int __init gemini_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
+{
|
|
+ if (slot < 9 || slot > 12)
|
|
+ return -1;
|
|
+
|
|
+ return PCI_IRQ_BASE + (((slot - 9) + (pin - 1)) & 0x3);
|
|
+}
|
|
+
|
|
+static struct hw_pci gemini_hw_pci __initdata = {
|
|
+ .nr_controllers = 1,
|
|
+ .setup = gemini_pci_setup,
|
|
+ .scan = gemini_pci_scan_bus,
|
|
+ .map_irq = gemini_pci_map_irq,
|
|
+};
|
|
+
|
|
+/* we need this for muxed PCI interrupts handling */
|
|
+static struct pci_bus bogus_pci_bus;
|
|
+
|
|
+static void gemini_pci_ack_irq(struct irq_data *d)
|
|
+{
|
|
+ unsigned int irq = d->irq;
|
|
+ unsigned int reg;
|
|
+
|
|
+ gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, ®);
|
|
+ reg &= ~(0xF << PCI_CTRL2_INTSTS_OFFSET);
|
|
+ reg |= 1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTSTS_OFFSET);
|
|
+ gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
|
|
+}
|
|
+
|
|
+static void gemini_pci_mask_irq(struct irq_data *d)
|
|
+{
|
|
+ unsigned int irq = d->irq;
|
|
+ unsigned int reg;
|
|
+
|
|
+ gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, ®);
|
|
+ reg &= ~((0xF << PCI_CTRL2_INTSTS_OFFSET)
|
|
+ | (1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTMASK_OFFSET)));
|
|
+ gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
|
|
+}
|
|
+
|
|
+static void gemini_pci_unmask_irq(struct irq_data *d)
|
|
+{
|
|
+ unsigned int irq = d->irq;
|
|
+ unsigned int reg;
|
|
+
|
|
+ gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, ®);
|
|
+ reg &= ~(0xF << PCI_CTRL2_INTSTS_OFFSET);
|
|
+ reg |= 1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTMASK_OFFSET);
|
|
+ gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
|
|
+}
|
|
+
|
|
+static void gemini_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
+{
|
|
+ unsigned int pci_irq_no, irq_stat, reg, i;
|
|
+
|
|
+ gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, ®);
|
|
+ irq_stat = reg >> PCI_CTRL2_INTSTS_OFFSET;
|
|
+
|
|
+ for (i = 0; i < 4; i++) {
|
|
+
|
|
+ if ((irq_stat & (1 << i)) == 0)
|
|
+ continue;
|
|
+
|
|
+ pci_irq_no = PCI_IRQ_BASE + i;
|
|
+
|
|
+ BUG_ON(!(irq_desc[pci_irq_no].handle_irq));
|
|
+ irq_desc[pci_irq_no].handle_irq(pci_irq_no,
|
|
+ &irq_desc[pci_irq_no]);
|
|
+ }
|
|
+}
|
|
+
|
|
+static struct irq_chip gemini_pci_irq_chip = {
|
|
+ .name = "PCI",
|
|
+ .irq_ack = gemini_pci_ack_irq,
|
|
+ .irq_mask = gemini_pci_mask_irq,
|
|
+ .irq_unmask = gemini_pci_unmask_irq,
|
|
+};
|
|
+
|
|
+static int __init gemini_pci_init(void)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ for (i = 72; i <= 95; i++)
|
|
+ gpio_request(i, "PCI");
|
|
+
|
|
+ /* initialize our bogus bus */
|
|
+ dev_set_name(&bogus_pci_bus.dev, "PCI IRQ handler");
|
|
+ bogus_pci_bus.number = 0;
|
|
+
|
|
+ /* mask and clear all interrupts */
|
|
+ gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2 + 2, 2,
|
|
+ 0xF000);
|
|
+
|
|
+ for (i = PCI_IRQ_BASE; i < PCI_IRQ_BASE + 4; i++) {
|
|
+ irq_set_chip_and_handler(i, &gemini_pci_irq_chip,
|
|
+ handle_level_irq);
|
|
+ set_irq_flags(i, IRQF_VALID);
|
|
+ }
|
|
+
|
|
+ irq_set_chained_handler(IRQ_PCI, gemini_pci_irq_handler);
|
|
+
|
|
+ pci_common_init(&gemini_hw_pci);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+subsys_initcall(gemini_pci_init);
|