1 /* 2 * cb710/cb710.h 3 * 4 * Copyright by Michał Mirosław, 2008-2009 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 #ifndef LINUX_CB710_DRIVER_H 11 #define LINUX_CB710_DRIVER_H 12 13 #include <linux/io.h> 14 #include <linux/interrupt.h> 15 #include <linux/spinlock.h> 16 #include <linux/pci.h> 17 #include <linux/platform_device.h> 18 #include <linux/mmc/host.h> 19 20 struct cb710_slot; 21 22 typedef int (*cb710_irq_handler_t)(struct cb710_slot *); 23 24 /* per-virtual-slot structure */ 25 struct cb710_slot { 26 struct platform_device pdev; 27 void __iomem *iobase; 28 cb710_irq_handler_t irq_handler; 29 }; 30 31 /* per-device structure */ 32 struct cb710_chip { 33 struct pci_dev *pdev; 34 void __iomem *iobase; 35 unsigned platform_id; 36 #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS 37 atomic_t slot_refs_count; 38 #endif 39 unsigned slot_mask; 40 unsigned slots; 41 spinlock_t irq_lock; 42 struct cb710_slot slot[0]; 43 }; 44 45 /* NOTE: cb710_chip.slots is modified only during device init/exit and 46 * they are all serialized wrt themselves */ 47 48 /* cb710_chip.slot_mask values */ 49 #define CB710_SLOT_MMC 1 50 #define CB710_SLOT_MS 2 51 #define CB710_SLOT_SM 4 52 53 /* slot port accessors - so the logic is more clear in the code */ 54 #define CB710_PORT_ACCESSORS(t) \ 55 static inline void cb710_write_port_##t(struct cb710_slot *slot, \ 56 unsigned port, u##t value) \ 57 { \ 58 iowrite##t(value, slot->iobase + port); \ 59 } \ 60 \ 61 static inline u##t cb710_read_port_##t(struct cb710_slot *slot, \ 62 unsigned port) \ 63 { \ 64 return ioread##t(slot->iobase + port); \ 65 } \ 66 \ 67 static inline void cb710_modify_port_##t(struct cb710_slot *slot, \ 68 unsigned port, u##t set, u##t clear) \ 69 { \ 70 iowrite##t( \ 71 (ioread##t(slot->iobase + port) & ~clear)|set, \ 72 slot->iobase + port); \ 73 } 74 75 CB710_PORT_ACCESSORS(8) 76 CB710_PORT_ACCESSORS(16) 77 CB710_PORT_ACCESSORS(32) 78 79 void cb710_pci_update_config_reg(struct pci_dev *pdev, 80 int reg, uint32_t and, uint32_t xor); 81 void cb710_set_irq_handler(struct cb710_slot *slot, 82 cb710_irq_handler_t handler); 83 84 /* some device struct walking */ 85 86 static inline struct cb710_slot *cb710_pdev_to_slot( 87 struct platform_device *pdev) 88 { 89 return container_of(pdev, struct cb710_slot, pdev); 90 } 91 92 static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot) 93 { 94 return dev_get_drvdata(slot->pdev.dev.parent); 95 } 96 97 static inline struct device *cb710_slot_dev(struct cb710_slot *slot) 98 { 99 return &slot->pdev.dev; 100 } 101 102 static inline struct device *cb710_chip_dev(struct cb710_chip *chip) 103 { 104 return &chip->pdev->dev; 105 } 106 107 /* debugging aids */ 108 109 #ifdef CONFIG_CB710_DEBUG 110 void cb710_dump_regs(struct cb710_chip *chip, unsigned dump); 111 #else 112 #define cb710_dump_regs(c, d) do {} while (0) 113 #endif 114 115 #define CB710_DUMP_REGS_MMC 0x0F 116 #define CB710_DUMP_REGS_MS 0x30 117 #define CB710_DUMP_REGS_SM 0xC0 118 #define CB710_DUMP_REGS_ALL 0xFF 119 #define CB710_DUMP_REGS_MASK 0xFF 120 121 #define CB710_DUMP_ACCESS_8 0x100 122 #define CB710_DUMP_ACCESS_16 0x200 123 #define CB710_DUMP_ACCESS_32 0x400 124 #define CB710_DUMP_ACCESS_ALL 0x700 125 #define CB710_DUMP_ACCESS_MASK 0x700 126 127 #endif /* LINUX_CB710_DRIVER_H */ 128 /* 129 * cb710/sgbuf2.h 130 * 131 * Copyright by Michał Mirosław, 2008-2009 132 * 133 * This program is free software; you can redistribute it and/or modify 134 * it under the terms of the GNU General Public License version 2 as 135 * published by the Free Software Foundation. 136 */ 137 #ifndef LINUX_CB710_SG_H 138 #define LINUX_CB710_SG_H 139 140 #include <linux/highmem.h> 141 #include <linux/scatterlist.h> 142 143 /** 144 * cb710_sg_miter_stop_writing - stop mapping iteration after writing 145 * @miter: sg mapping iter to be stopped 146 * 147 * Description: 148 * Stops mapping iterator @miter. @miter should have been started 149 * started using sg_miter_start(). A stopped iteration can be 150 * resumed by calling sg_miter_next() on it. This is useful when 151 * resources (kmap) need to be released during iteration. 152 * 153 * This is a convenience wrapper that will be optimized out for arches 154 * that don't need flush_kernel_dcache_page(). 155 * 156 * Context: 157 * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. 158 */ 159 static inline void cb710_sg_miter_stop_writing(struct sg_mapping_iter *miter) 160 { 161 if (miter->page) 162 flush_kernel_dcache_page(miter->page); 163 sg_miter_stop(miter); 164 } 165 166 /* 167 * 32-bit PIO mapping sg iterator 168 * 169 * Hides scatterlist access issues - fragment boundaries, alignment, page 170 * mapping - for drivers using 32-bit-word-at-a-time-PIO (ie. PCI devices 171 * without DMA support). 172 * 173 * Best-case reading (transfer from device): 174 * sg_miter_start(); 175 * cb710_sg_dwiter_write_from_io(); 176 * cb710_sg_miter_stop_writing(); 177 * 178 * Best-case writing (transfer to device): 179 * sg_miter_start(); 180 * cb710_sg_dwiter_read_to_io(); 181 * sg_miter_stop(); 182 */ 183 184 uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter); 185 void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data); 186 187 /** 188 * cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32-bit IO port 189 * @miter: sg mapping iter 190 * @port: PIO port - IO or MMIO address 191 * @count: number of 32-bit words to transfer 192 * 193 * Description: 194 * Reads @count 32-bit words from register @port and stores it in 195 * buffer iterated by @miter. Data that would overflow the buffer 196 * is silently ignored. Iterator is advanced by 4*@count bytes 197 * or to the buffer's end whichever is closer. 198 * 199 * Context: 200 * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. 201 */ 202 static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter, 203 void __iomem *port, size_t count) 204 { 205 while (count-- > 0) 206 cb710_sg_dwiter_write_next_block(miter, ioread32(port)); 207 } 208 209 /** 210 * cb710_sg_dwiter_read_to_io - transfer data to 32-bit IO port from mapped buffer 211 * @miter: sg mapping iter 212 * @port: PIO port - IO or MMIO address 213 * @count: number of 32-bit words to transfer 214 * 215 * Description: 216 * Writes @count 32-bit words to register @port from buffer iterated 217 * through @miter. If buffer ends before @count words are written 218 * missing data is replaced by zeroes. @miter is advanced by 4*@count 219 * bytes or to the buffer's end whichever is closer. 220 * 221 * Context: 222 * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. 223 */ 224 static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter, 225 void __iomem *port, size_t count) 226 { 227 while (count-- > 0) 228 iowrite32(cb710_sg_dwiter_read_next_block(miter), port); 229 } 230 231 #endif /* LINUX_CB710_SG_H */ 232