1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * PCMCIA driver for SL811HS (as found in REX-CFU1U) 4 * Filename: sl811_cs.c 5 * Author: Yukio Yamamoto 6 * 7 * Port to sl811-hcd and 2.6.x by 8 * Botond Botyanszki <boti@rocketmail.com> 9 * Simon Pickering 10 * 11 * Last update: 2005-05-12 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/ptrace.h> 17 #include <linux/slab.h> 18 #include <linux/string.h> 19 #include <linux/timer.h> 20 #include <linux/ioport.h> 21 #include <linux/platform_device.h> 22 23 #include <pcmcia/cistpl.h> 24 #include <pcmcia/cisreg.h> 25 #include <pcmcia/ds.h> 26 27 #include <linux/usb/sl811.h> 28 29 MODULE_AUTHOR("Botond Botyanszki"); 30 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6"); 31 MODULE_LICENSE("GPL"); 32 33 34 /*====================================================================*/ 35 /* MACROS */ 36 /*====================================================================*/ 37 38 #define INFO(args...) printk(KERN_INFO "sl811_cs: " args) 39 40 /*====================================================================*/ 41 /* VARIABLES */ 42 /*====================================================================*/ 43 44 typedef struct local_info_t { 45 struct pcmcia_device *p_dev; 46 } local_info_t; 47 48 static void sl811_cs_release(struct pcmcia_device * link); 49 50 /*====================================================================*/ 51 52 static void release_platform_dev(struct device * dev) 53 { 54 dev_dbg(dev, "sl811_cs platform_dev release\n"); 55 dev->parent = NULL; 56 } 57 58 static struct sl811_platform_data platform_data = { 59 .potpg = 100, 60 .power = 50, /* == 100mA */ 61 // .reset = ... FIXME: invoke CF reset on the card 62 }; 63 64 static struct resource resources[] = { 65 [0] = { 66 .flags = IORESOURCE_IRQ, 67 }, 68 [1] = { 69 // .name = "address", 70 .flags = IORESOURCE_IO, 71 }, 72 [2] = { 73 // .name = "data", 74 .flags = IORESOURCE_IO, 75 }, 76 }; 77 78 extern struct platform_driver sl811h_driver; 79 80 static struct platform_device platform_dev = { 81 .id = -1, 82 .dev = { 83 .platform_data = &platform_data, 84 .release = release_platform_dev, 85 }, 86 .resource = resources, 87 .num_resources = ARRAY_SIZE(resources), 88 }; 89 90 static int sl811_hc_init(struct device *parent, resource_size_t base_addr, 91 int irq) 92 { 93 if (platform_dev.dev.parent) 94 return -EBUSY; 95 platform_dev.dev.parent = parent; 96 97 /* finish seting up the platform device */ 98 resources[0].start = irq; 99 100 resources[1].start = base_addr; 101 resources[1].end = base_addr; 102 103 resources[2].start = base_addr + 1; 104 resources[2].end = base_addr + 1; 105 106 /* The driver core will probe for us. We know sl811-hcd has been 107 * initialized already because of the link order dependency created 108 * by referencing "sl811h_driver". 109 */ 110 platform_dev.name = sl811h_driver.driver.name; 111 return platform_device_register(&platform_dev); 112 } 113 114 /*====================================================================*/ 115 116 static void sl811_cs_detach(struct pcmcia_device *link) 117 { 118 dev_dbg(&link->dev, "sl811_cs_detach\n"); 119 120 sl811_cs_release(link); 121 122 /* This points to the parent local_info_t struct */ 123 kfree(link->priv); 124 } 125 126 static void sl811_cs_release(struct pcmcia_device * link) 127 { 128 dev_dbg(&link->dev, "sl811_cs_release\n"); 129 130 pcmcia_disable_device(link); 131 platform_device_unregister(&platform_dev); 132 } 133 134 static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data) 135 { 136 if (p_dev->config_index == 0) 137 return -EINVAL; 138 139 return pcmcia_request_io(p_dev); 140 } 141 142 143 static int sl811_cs_config(struct pcmcia_device *link) 144 { 145 struct device *parent = &link->dev; 146 int ret; 147 148 dev_dbg(&link->dev, "sl811_cs_config\n"); 149 150 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP | 151 CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO; 152 153 if (pcmcia_loop_config(link, sl811_cs_config_check, NULL)) 154 goto failed; 155 156 /* require an IRQ and two registers */ 157 if (resource_size(link->resource[0]) < 2) 158 goto failed; 159 160 if (!link->irq) 161 goto failed; 162 163 ret = pcmcia_enable_device(link); 164 if (ret) 165 goto failed; 166 167 if (sl811_hc_init(parent, link->resource[0]->start, link->irq) 168 < 0) { 169 failed: 170 printk(KERN_WARNING "sl811_cs_config failed\n"); 171 sl811_cs_release(link); 172 return -ENODEV; 173 } 174 return 0; 175 } 176 177 static int sl811_cs_probe(struct pcmcia_device *link) 178 { 179 local_info_t *local; 180 181 local = kzalloc(sizeof(local_info_t), GFP_KERNEL); 182 if (!local) 183 return -ENOMEM; 184 local->p_dev = link; 185 link->priv = local; 186 187 return sl811_cs_config(link); 188 } 189 190 static const struct pcmcia_device_id sl811_ids[] = { 191 PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */ 192 PCMCIA_DEVICE_NULL, 193 }; 194 MODULE_DEVICE_TABLE(pcmcia, sl811_ids); 195 196 static struct pcmcia_driver sl811_cs_driver = { 197 .owner = THIS_MODULE, 198 .name = "sl811_cs", 199 .probe = sl811_cs_probe, 200 .remove = sl811_cs_detach, 201 .id_table = sl811_ids, 202 }; 203 module_pcmcia_driver(sl811_cs_driver); 204