aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia/cardbus.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pcmcia/cardbus.c')
-rw-r--r--drivers/pcmcia/cardbus.c175
1 files changed, 14 insertions, 161 deletions
diff --git a/drivers/pcmcia/cardbus.c b/drivers/pcmcia/cardbus.c
index d99f846451a3..ac0686efbf75 100644
--- a/drivers/pcmcia/cardbus.c
+++ b/drivers/pcmcia/cardbus.c
@@ -20,170 +20,12 @@
20 */ 20 */
21 21
22 22
23#include <linux/module.h>
24#include <linux/kernel.h> 23#include <linux/kernel.h>
25#include <linux/string.h> 24#include <linux/module.h>
26#include <linux/slab.h>
27#include <linux/mm.h>
28#include <linux/pci.h> 25#include <linux/pci.h>
29#include <linux/ioport.h>
30#include <linux/io.h>
31#include <asm/irq.h>
32 26
33#include <pcmcia/cs_types.h>
34#include <pcmcia/ss.h> 27#include <pcmcia/ss.h>
35#include <pcmcia/cs.h>
36#include <pcmcia/cistpl.h>
37#include "cs_internal.h"
38
39/*====================================================================*/
40
41/* Offsets in the Expansion ROM Image Header */
42#define ROM_SIGNATURE 0x0000 /* 2 bytes */
43#define ROM_DATA_PTR 0x0018 /* 2 bytes */
44
45/* Offsets in the CardBus PC Card Data Structure */
46#define PCDATA_SIGNATURE 0x0000 /* 4 bytes */
47#define PCDATA_VPD_PTR 0x0008 /* 2 bytes */
48#define PCDATA_LENGTH 0x000a /* 2 bytes */
49#define PCDATA_REVISION 0x000c
50#define PCDATA_IMAGE_SZ 0x0010 /* 2 bytes */
51#define PCDATA_ROM_LEVEL 0x0012 /* 2 bytes */
52#define PCDATA_CODE_TYPE 0x0014
53#define PCDATA_INDICATOR 0x0015
54
55/*=====================================================================
56
57 Expansion ROM's have a special layout, and pointers specify an
58 image number and an offset within that image. xlate_rom_addr()
59 converts an image/offset address to an absolute offset from the
60 ROM's base address.
61
62=====================================================================*/
63
64static u_int xlate_rom_addr(void __iomem *b, u_int addr)
65{
66 u_int img = 0, ofs = 0, sz;
67 u_short data;
68 while ((readb(b) == 0x55) && (readb(b + 1) == 0xaa)) {
69 if (img == (addr >> 28))
70 return (addr & 0x0fffffff) + ofs;
71 data = readb(b + ROM_DATA_PTR) + (readb(b + ROM_DATA_PTR + 1) << 8);
72 sz = 512 * (readb(b + data + PCDATA_IMAGE_SZ) +
73 (readb(b + data + PCDATA_IMAGE_SZ + 1) << 8));
74 if ((sz == 0) || (readb(b + data + PCDATA_INDICATOR) & 0x80))
75 break;
76 b += sz;
77 ofs += sz;
78 img++;
79 }
80 return 0;
81}
82
83/*=====================================================================
84
85 These are similar to setup_cis_mem and release_cis_mem for 16-bit
86 cards. The "result" that is used externally is the cb_cis_virt
87 pointer in the struct pcmcia_socket structure.
88
89=====================================================================*/
90
91static void cb_release_cis_mem(struct pcmcia_socket *s)
92{
93 if (s->cb_cis_virt) {
94 dev_dbg(&s->dev, "cb_release_cis_mem()\n");
95 iounmap(s->cb_cis_virt);
96 s->cb_cis_virt = NULL;
97 s->cb_cis_res = NULL;
98 }
99}
100
101static int cb_setup_cis_mem(struct pcmcia_socket *s, struct resource *res)
102{
103 unsigned int start, size;
104
105 if (res == s->cb_cis_res)
106 return 0;
107
108 if (s->cb_cis_res)
109 cb_release_cis_mem(s);
110
111 start = res->start;
112 size = res->end - start + 1;
113 s->cb_cis_virt = ioremap(start, size);
114
115 if (!s->cb_cis_virt)
116 return -1;
117
118 s->cb_cis_res = res;
119
120 return 0;
121}
122
123/*=====================================================================
124
125 This is used by the CIS processing code to read CIS information
126 from a CardBus device.
127
128=====================================================================*/
129
130int read_cb_mem(struct pcmcia_socket *s, int space, u_int addr, u_int len,
131 void *ptr)
132{
133 struct pci_dev *dev;
134 struct resource *res;
135
136 dev_dbg(&s->dev, "read_cb_mem(%d, %#x, %u)\n", space, addr, len);
137 28
138 dev = pci_get_slot(s->cb_dev->subordinate, 0);
139 if (!dev)
140 goto fail;
141
142 /* Config space? */
143 if (space == 0) {
144 if (addr + len > 0x100)
145 goto failput;
146 for (; len; addr++, ptr++, len--)
147 pci_read_config_byte(dev, addr, ptr);
148 return 0;
149 }
150
151 res = dev->resource + space - 1;
152
153 pci_dev_put(dev);
154
155 if (!res->flags)
156 goto fail;
157
158 if (cb_setup_cis_mem(s, res) != 0)
159 goto fail;
160
161 if (space == 7) {
162 addr = xlate_rom_addr(s->cb_cis_virt, addr);
163 if (addr == 0)
164 goto fail;
165 }
166
167 if (addr + len > res->end - res->start)
168 goto fail;
169
170 memcpy_fromio(ptr, s->cb_cis_virt + addr, len);
171 return 0;
172
173failput:
174 pci_dev_put(dev);
175fail:
176 memset(ptr, 0xff, len);
177 return -1;
178}
179
180/*=====================================================================
181
182 cb_alloc() and cb_free() allocate and free the kernel data
183 structures for a Cardbus device, and handle the lowest level PCI
184 device setup issues.
185
186=====================================================================*/
187 29
188static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq) 30static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq)
189{ 31{
@@ -215,6 +57,13 @@ static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq)
215 } 57 }
216} 58}
217 59
60/**
61 * cb_alloc() - add CardBus device
62 * @s: the pcmcia_socket where the CardBus device is located
63 *
64 * cb_alloc() allocates the kernel data structures for a Cardbus device
65 * and handles the lowest level PCI device setup issues.
66 */
218int __ref cb_alloc(struct pcmcia_socket *s) 67int __ref cb_alloc(struct pcmcia_socket *s)
219{ 68{
220 struct pci_bus *bus = s->cb_dev->subordinate; 69 struct pci_bus *bus = s->cb_dev->subordinate;
@@ -249,12 +98,16 @@ int __ref cb_alloc(struct pcmcia_socket *s)
249 return 0; 98 return 0;
250} 99}
251 100
101/**
102 * cb_free() - remove CardBus device
103 * @s: the pcmcia_socket where the CardBus device was located
104 *
105 * cb_free() handles the lowest level PCI device cleanup.
106 */
252void cb_free(struct pcmcia_socket *s) 107void cb_free(struct pcmcia_socket *s)
253{ 108{
254 struct pci_dev *bridge = s->cb_dev; 109 struct pci_dev *bridge = s->cb_dev;
255 110
256 cb_release_cis_mem(s);
257
258 if (bridge) 111 if (bridge)
259 pci_remove_behind_bridge(bridge); 112 pci_remove_behind_bridge(bridge);
260} 113}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-07 15:14:24 -0500