Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $ |
| 2 | * parport.h: sparc64 specific parport initialization and dma. |
| 3 | * |
| 4 | * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be) |
| 5 | */ |
| 6 | |
| 7 | #ifndef _ASM_SPARC64_PARPORT_H |
| 8 | #define _ASM_SPARC64_PARPORT_H 1 |
| 9 | |
| 10 | #include <asm/ebus.h> |
| 11 | #include <asm/isa.h> |
| 12 | #include <asm/ns87303.h> |
| 13 | |
| 14 | #define PARPORT_PC_MAX_PORTS PARPORT_MAX |
| 15 | |
Al Viro | 7fbacd5 | 2005-05-04 05:39:32 +0100 | [diff] [blame] | 16 | /* |
| 17 | * While sparc64 doesn't have an ISA DMA API, we provide something that looks |
| 18 | * close enough to make parport_pc happy |
| 19 | */ |
| 20 | #define HAS_DMA |
| 21 | |
David S. Miller | 2ef5507 | 2007-03-08 14:48:36 -0800 | [diff] [blame] | 22 | static DEFINE_SPINLOCK(dma_spin_lock); |
| 23 | |
| 24 | #define claim_dma_lock() \ |
| 25 | ({ unsigned long flags; \ |
| 26 | spin_lock_irqsave(&dma_spin_lock, flags); \ |
| 27 | flags; \ |
| 28 | }) |
| 29 | |
| 30 | #define release_dma_lock(__flags) \ |
| 31 | spin_unlock_irqrestore(&dma_spin_lock, __flags); |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | static struct sparc_ebus_info { |
| 34 | struct ebus_dma_info info; |
| 35 | unsigned int addr; |
| 36 | unsigned int count; |
David S. Miller | 74bd7d0 | 2007-02-28 13:09:34 -0800 | [diff] [blame] | 37 | int lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS]; |
| 39 | |
David S. Miller | 74bd7d0 | 2007-02-28 13:09:34 -0800 | [diff] [blame] | 40 | static __inline__ int request_dma(unsigned int dmanr, const char *device_id) |
| 41 | { |
| 42 | if (dmanr >= PARPORT_PC_MAX_PORTS) |
| 43 | return -EINVAL; |
| 44 | if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0) |
| 45 | return -EBUSY; |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | static __inline__ void free_dma(unsigned int dmanr) |
| 50 | { |
| 51 | if (dmanr >= PARPORT_PC_MAX_PORTS) { |
| 52 | printk(KERN_WARNING "Trying to free DMA%d\n", dmanr); |
| 53 | return; |
| 54 | } |
| 55 | if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) { |
| 56 | printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr); |
| 57 | return; |
| 58 | } |
| 59 | } |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static __inline__ void enable_dma(unsigned int dmanr) |
| 62 | { |
Eddie C. Dost | e3e01d6 | 2005-07-06 15:41:54 -0700 | [diff] [blame] | 63 | ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1); |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info, |
| 66 | sparc_ebus_dmas[dmanr].addr, |
| 67 | sparc_ebus_dmas[dmanr].count)) |
| 68 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | static __inline__ void disable_dma(unsigned int dmanr) |
| 72 | { |
| 73 | ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0); |
| 74 | } |
| 75 | |
| 76 | static __inline__ void clear_dma_ff(unsigned int dmanr) |
| 77 | { |
| 78 | /* nothing */ |
| 79 | } |
| 80 | |
| 81 | static __inline__ void set_dma_mode(unsigned int dmanr, char mode) |
| 82 | { |
| 83 | ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE)); |
| 84 | } |
| 85 | |
| 86 | static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr) |
| 87 | { |
| 88 | sparc_ebus_dmas[dmanr].addr = addr; |
| 89 | } |
| 90 | |
| 91 | static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count) |
| 92 | { |
| 93 | sparc_ebus_dmas[dmanr].count = count; |
| 94 | } |
| 95 | |
| 96 | static __inline__ unsigned int get_dma_residue(unsigned int dmanr) |
| 97 | { |
| 98 | return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info); |
| 99 | } |
| 100 | |
| 101 | static int ebus_ecpp_p(struct linux_ebus_device *edev) |
| 102 | { |
David S. Miller | 690c8fd | 2006-06-22 19:12:03 -0700 | [diff] [blame] | 103 | if (!strcmp(edev->prom_node->name, "ecpp")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return 1; |
David S. Miller | 690c8fd | 2006-06-22 19:12:03 -0700 | [diff] [blame] | 105 | if (!strcmp(edev->prom_node->name, "parallel")) { |
Stephen Rothwell | 66f3cb7 | 2007-03-29 00:50:29 -0700 | [diff] [blame] | 106 | const char *compat; |
David S. Miller | 690c8fd | 2006-06-22 19:12:03 -0700 | [diff] [blame] | 107 | |
| 108 | compat = of_get_property(edev->prom_node, |
| 109 | "compatible", NULL); |
| 110 | if (compat && |
| 111 | (!strcmp(compat, "ecpp") || |
| 112 | !strcmp(compat, "ns87317-ecpp") || |
| 113 | !strcmp(compat + 13, "ecpp"))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return 1; |
| 115 | } |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int parport_isa_probe(int count) |
| 120 | { |
| 121 | struct sparc_isa_bridge *isa_br; |
| 122 | struct sparc_isa_device *isa_dev; |
| 123 | |
| 124 | for_each_isa(isa_br) { |
| 125 | for_each_isadev(isa_dev, isa_br) { |
| 126 | struct sparc_isa_device *child; |
| 127 | unsigned long base; |
| 128 | |
David S. Miller | 690c8fd | 2006-06-22 19:12:03 -0700 | [diff] [blame] | 129 | if (strcmp(isa_dev->prom_node->name, "dma")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | continue; |
| 131 | |
| 132 | child = isa_dev->child; |
| 133 | while (child) { |
David S. Miller | 690c8fd | 2006-06-22 19:12:03 -0700 | [diff] [blame] | 134 | if (!strcmp(child->prom_node->name, "parallel")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | break; |
| 136 | child = child->next; |
| 137 | } |
| 138 | if (!child) |
| 139 | continue; |
| 140 | |
| 141 | base = child->resource.start; |
| 142 | |
| 143 | /* No DMA, see commentary in |
| 144 | * asm-sparc64/floppy.h:isa_floppy_init() |
| 145 | */ |
| 146 | if (parport_pc_probe_port(base, base + 0x400, |
| 147 | child->irq, PARPORT_DMA_NOFIFO, |
| 148 | child->bus->self)) |
| 149 | count++; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return count; |
| 154 | } |
| 155 | |
| 156 | static int parport_pc_find_nonpci_ports (int autoirq, int autodma) |
| 157 | { |
| 158 | struct linux_ebus *ebus; |
| 159 | struct linux_ebus_device *edev; |
| 160 | int count = 0; |
| 161 | |
| 162 | for_each_ebus(ebus) { |
| 163 | for_each_ebusdev(edev, ebus) { |
| 164 | if (ebus_ecpp_p(edev)) { |
| 165 | unsigned long base = edev->resource[0].start; |
| 166 | unsigned long config = edev->resource[1].start; |
| 167 | unsigned long d_base = edev->resource[2].start; |
| 168 | unsigned long d_len; |
| 169 | |
| 170 | spin_lock_init(&sparc_ebus_dmas[count].info.lock); |
| 171 | d_len = (edev->resource[2].end - |
| 172 | d_base) + 1; |
| 173 | sparc_ebus_dmas[count].info.regs = |
| 174 | ioremap(d_base, d_len); |
| 175 | if (!sparc_ebus_dmas[count].info.regs) |
| 176 | continue; |
| 177 | sparc_ebus_dmas[count].info.flags = 0; |
| 178 | sparc_ebus_dmas[count].info.callback = NULL; |
| 179 | sparc_ebus_dmas[count].info.client_cookie = NULL; |
| 180 | sparc_ebus_dmas[count].info.irq = 0xdeadbeef; |
| 181 | strcpy(sparc_ebus_dmas[count].info.name, "parport"); |
| 182 | if (ebus_dma_register(&sparc_ebus_dmas[count].info)) |
| 183 | continue; |
| 184 | ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1); |
| 185 | |
| 186 | /* Configure IRQ to Push Pull, Level Low */ |
| 187 | /* Enable ECP, set bit 2 of the CTR first */ |
| 188 | outb(0x04, base + 0x02); |
| 189 | ns87303_modify(config, PCR, |
| 190 | PCR_EPP_ENABLE | |
| 191 | PCR_IRQ_ODRAIN, |
| 192 | PCR_ECP_ENABLE | |
| 193 | PCR_ECP_CLK_ENA | |
| 194 | PCR_IRQ_POLAR); |
| 195 | |
| 196 | /* CTR bit 5 controls direction of port */ |
| 197 | ns87303_modify(config, PTR, |
| 198 | 0, PTR_LPT_REG_DIR); |
| 199 | |
| 200 | if (parport_pc_probe_port(base, base + 0x400, |
| 201 | edev->irqs[0], |
| 202 | count, ebus->self)) |
| 203 | count++; |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | count = parport_isa_probe(count); |
| 209 | |
| 210 | return count; |
| 211 | } |
| 212 | |
| 213 | #endif /* !(_ASM_SPARC64_PARPORT_H */ |