Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 1 | /* |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 2 | * linux/arch/arm/mach-pxa/cm-x2xx-pci.c |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 3 | * |
| 4 | * PCI bios-type initialisation for PCI machines |
| 5 | * |
| 6 | * Bits taken from various places. |
| 7 | * |
Mike Rapoport | 2f01a97 | 2008-06-17 12:29:58 +0100 | [diff] [blame] | 8 | * Copyright (C) 2007, 2008 Compulab, Ltd. |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 9 | * Mike Rapoport <mike@compulab.co.il> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/pci.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/irq.h> |
Mike Rapoport | 2f01a97 | 2008-06-17 12:29:58 +0100 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 23 | |
| 24 | #include <asm/mach/pci.h> |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 25 | #include <asm/mach-types.h> |
| 26 | |
| 27 | #include <asm/hardware/it8152.h> |
| 28 | |
Mike Rapoport | 2f01a97 | 2008-06-17 12:29:58 +0100 | [diff] [blame] | 29 | unsigned long it8152_base_address; |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 30 | static int cmx2xx_it8152_irq_gpio; |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * Only first 64MB of memory can be accessed via PCI. |
| 34 | * We use GFP_DMA to allocate safe buffers to do map/unmap. |
| 35 | * This is really ugly and we need a better way of specifying |
| 36 | * DMA-capable regions of memory. |
| 37 | */ |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 38 | void __init cmx2xx_pci_adjust_zones(int node, unsigned long *zone_size, |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 39 | unsigned long *zhole_size) |
| 40 | { |
| 41 | unsigned int sz = SZ_64M >> PAGE_SHIFT; |
| 42 | |
Mike Rapoport | 5855a1e | 2008-05-12 06:41:13 +0100 | [diff] [blame] | 43 | if (machine_is_armcore()) { |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 44 | pr_info("Adjusting zones for CM-X2XX\n"); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 45 | |
Mike Rapoport | 5855a1e | 2008-05-12 06:41:13 +0100 | [diff] [blame] | 46 | /* |
| 47 | * Only adjust if > 64M on current system |
| 48 | */ |
| 49 | if (node || (zone_size[0] <= sz)) |
| 50 | return; |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 51 | |
Mike Rapoport | 5855a1e | 2008-05-12 06:41:13 +0100 | [diff] [blame] | 52 | zone_size[1] = zone_size[0] - sz; |
| 53 | zone_size[0] = sz; |
| 54 | zhole_size[1] = zhole_size[0]; |
| 55 | zhole_size[0] = 0; |
| 56 | } |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 57 | } |
| 58 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 59 | static void cmx2xx_it8152_irq_demux(unsigned int irq, struct irq_desc *desc) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 60 | { |
| 61 | /* clear our parent irq */ |
Eric Miao | 669cb51 | 2010-01-01 15:29:22 +0800 | [diff] [blame] | 62 | desc->chip->ack(irq); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 63 | |
| 64 | it8152_irq_demux(irq, desc); |
| 65 | } |
| 66 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 67 | void __cmx2xx_pci_init_irq(int irq_gpio) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 68 | { |
| 69 | it8152_init_irq(); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 70 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 71 | cmx2xx_it8152_irq_gpio = irq_gpio; |
Mike Rapoport | 2f01a97 | 2008-06-17 12:29:58 +0100 | [diff] [blame] | 72 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 73 | set_irq_type(gpio_to_irq(irq_gpio), IRQ_TYPE_EDGE_RISING); |
Mike Rapoport | 2f01a97 | 2008-06-17 12:29:58 +0100 | [diff] [blame] | 74 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 75 | set_irq_chained_handler(gpio_to_irq(irq_gpio), cmx2xx_it8152_irq_demux); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | #ifdef CONFIG_PM |
| 79 | static unsigned long sleep_save_ite[10]; |
| 80 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 81 | void __cmx2xx_pci_suspend(void) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 82 | { |
| 83 | /* save ITE state */ |
| 84 | sleep_save_ite[0] = __raw_readl(IT8152_INTC_PDCNIMR); |
| 85 | sleep_save_ite[1] = __raw_readl(IT8152_INTC_LPCNIMR); |
| 86 | sleep_save_ite[2] = __raw_readl(IT8152_INTC_LPNIAR); |
| 87 | |
| 88 | /* Clear ITE IRQ's */ |
| 89 | __raw_writel((0), IT8152_INTC_PDCNIRR); |
| 90 | __raw_writel((0), IT8152_INTC_LPCNIRR); |
| 91 | } |
| 92 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 93 | void __cmx2xx_pci_resume(void) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 94 | { |
| 95 | /* restore IT8152 state */ |
| 96 | __raw_writel((sleep_save_ite[0]), IT8152_INTC_PDCNIMR); |
| 97 | __raw_writel((sleep_save_ite[1]), IT8152_INTC_LPCNIMR); |
| 98 | __raw_writel((sleep_save_ite[2]), IT8152_INTC_LPNIAR); |
| 99 | } |
| 100 | #else |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 101 | void cmx2xx_pci_suspend(void) {} |
| 102 | void cmx2xx_pci_resume(void) {} |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 103 | #endif |
| 104 | |
| 105 | /* PCI IRQ mapping*/ |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 106 | static int __init cmx2xx_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 107 | { |
| 108 | int irq; |
| 109 | |
Harvey Harrison | 8e86f42 | 2008-03-04 15:08:02 -0800 | [diff] [blame] | 110 | dev_dbg(&dev->dev, "%s: slot=%x, pin=%x\n", __func__, slot, pin); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 111 | |
| 112 | irq = it8152_pci_map_irq(dev, slot, pin); |
| 113 | if (irq) |
| 114 | return irq; |
| 115 | |
| 116 | /* |
| 117 | Here comes the ugly part. The routing is baseboard specific, |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 118 | but defining a platform for each possible base of CM-X2XX is |
| 119 | unrealistic. Here we keep mapping for ATXBase and SB-X2XX. |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 120 | */ |
| 121 | /* ATXBASE PCI slot */ |
| 122 | if (slot == 7) |
| 123 | return IT8152_PCI_INTA; |
| 124 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 125 | /* ATXBase/SB-X2XX CardBus */ |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 126 | if (slot == 8 || slot == 0) |
| 127 | return IT8152_PCI_INTB; |
| 128 | |
| 129 | /* ATXBase Ethernet */ |
| 130 | if (slot == 9) |
| 131 | return IT8152_PCI_INTA; |
| 132 | |
Mike Rapoport | a7f3f03 | 2008-10-05 10:26:55 +0100 | [diff] [blame] | 133 | /* CM-x255 Onboard Ethernet */ |
| 134 | if (slot == 15) |
| 135 | return IT8152_PCI_INTC; |
| 136 | |
| 137 | /* SB-x2xx Ethernet */ |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 138 | if (slot == 16) |
| 139 | return IT8152_PCI_INTA; |
| 140 | |
| 141 | /* PC104+ interrupt routing */ |
| 142 | if ((slot == 17) || (slot == 19)) |
| 143 | return IT8152_PCI_INTA; |
| 144 | if ((slot == 18) || (slot == 20)) |
| 145 | return IT8152_PCI_INTB; |
| 146 | |
| 147 | return(0); |
| 148 | } |
| 149 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 150 | static void cmx2xx_pci_preinit(void) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 151 | { |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 152 | pr_info("Initializing CM-X2XX PCI subsystem\n"); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 153 | |
| 154 | __raw_writel(0x800, IT8152_PCI_CFG_ADDR); |
| 155 | if (__raw_readl(IT8152_PCI_CFG_DATA) == 0x81521283) { |
Mike Rapoport | a0113a9 | 2007-11-25 08:55:34 +0100 | [diff] [blame] | 156 | pr_info("PCI Bridge found.\n"); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 157 | |
| 158 | /* set PCI I/O base at 0 */ |
| 159 | writel(0x848, IT8152_PCI_CFG_ADDR); |
| 160 | writel(0, IT8152_PCI_CFG_DATA); |
| 161 | |
| 162 | /* set PCI memory base at 0 */ |
| 163 | writel(0x840, IT8152_PCI_CFG_ADDR); |
| 164 | writel(0, IT8152_PCI_CFG_DATA); |
| 165 | |
| 166 | writel(0x20, IT8152_GPIO_GPDR); |
| 167 | |
| 168 | /* CardBus Controller on ATXbase baseboard */ |
| 169 | writel(0x4000, IT8152_PCI_CFG_ADDR); |
| 170 | if (readl(IT8152_PCI_CFG_DATA) == 0xAC51104C) { |
Mike Rapoport | a0113a9 | 2007-11-25 08:55:34 +0100 | [diff] [blame] | 171 | pr_info("CardBus Bridge found.\n"); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 172 | |
| 173 | /* Configure socket 0 */ |
| 174 | writel(0x408C, IT8152_PCI_CFG_ADDR); |
| 175 | writel(0x1022, IT8152_PCI_CFG_DATA); |
| 176 | |
| 177 | writel(0x4080, IT8152_PCI_CFG_ADDR); |
| 178 | writel(0x3844d060, IT8152_PCI_CFG_DATA); |
| 179 | |
| 180 | writel(0x4090, IT8152_PCI_CFG_ADDR); |
| 181 | writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) | |
| 182 | 0x60440000), |
| 183 | IT8152_PCI_CFG_DATA); |
| 184 | |
| 185 | writel(0x4018, IT8152_PCI_CFG_ADDR); |
| 186 | writel(0xb0000000, IT8152_PCI_CFG_DATA); |
| 187 | |
| 188 | /* Configure socket 1 */ |
| 189 | writel(0x418C, IT8152_PCI_CFG_ADDR); |
| 190 | writel(0x1022, IT8152_PCI_CFG_DATA); |
| 191 | |
| 192 | writel(0x4180, IT8152_PCI_CFG_ADDR); |
| 193 | writel(0x3844d060, IT8152_PCI_CFG_DATA); |
| 194 | |
| 195 | writel(0x4190, IT8152_PCI_CFG_ADDR); |
| 196 | writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) | |
| 197 | 0x60440000), |
| 198 | IT8152_PCI_CFG_DATA); |
| 199 | |
| 200 | writel(0x4118, IT8152_PCI_CFG_ADDR); |
| 201 | writel(0xb0000000, IT8152_PCI_CFG_DATA); |
| 202 | } |
| 203 | } |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 204 | } |
| 205 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 206 | static struct hw_pci cmx2xx_pci __initdata = { |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 207 | .swizzle = pci_std_swizzle, |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 208 | .map_irq = cmx2xx_pci_map_irq, |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 209 | .nr_controllers = 1, |
| 210 | .setup = it8152_pci_setup, |
Mike Rapoport | a0113a9 | 2007-11-25 08:55:34 +0100 | [diff] [blame] | 211 | .scan = it8152_pci_scan_bus, |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 212 | .preinit = cmx2xx_pci_preinit, |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 213 | }; |
| 214 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 215 | static int __init cmx2xx_init_pci(void) |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 216 | { |
| 217 | if (machine_is_armcore()) |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 218 | pci_common_init(&cmx2xx_pci); |
Mike Rapoport | 3696a8a | 2007-09-23 15:59:26 +0100 | [diff] [blame] | 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
Mike Rapoport | da59193 | 2008-10-05 10:25:44 +0100 | [diff] [blame] | 223 | subsys_initcall(cmx2xx_init_pci); |