Commit | Line | Data |
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f2ec8030 TB |
1 | /* |
2 | * sni_82596.c -- driver for intel 82596 ethernet controller, as | |
3 | * used in older SNI RM machines | |
4 | */ | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/string.h> | |
9 | #include <linux/errno.h> | |
10 | #include <linux/ioport.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/delay.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/etherdevice.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/bitops.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/io.h> | |
22 | #include <linux/irq.h> | |
23 | ||
24 | #define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01" | |
25 | ||
26 | static const char sni_82596_string[] = "snirm_82596"; | |
27 | ||
28 | #define DMA_ALLOC dma_alloc_coherent | |
29 | #define DMA_FREE dma_free_coherent | |
30 | #define DMA_WBACK(priv, addr, len) do { } while (0) | |
31 | #define DMA_INV(priv, addr, len) do { } while (0) | |
32 | #define DMA_WBACK_INV(priv, addr, len) do { } while (0) | |
33 | ||
34 | #define SYSBUS 0x00004400 | |
35 | ||
36 | /* big endian CPU, 82596 little endian */ | |
37 | #define SWAP32(x) cpu_to_le32((u32)(x)) | |
38 | #define SWAP16(x) cpu_to_le16((u16)(x)) | |
39 | ||
40 | #define OPT_MPU_16BIT 0x01 | |
41 | ||
42 | #include "lib82596.c" | |
43 | ||
44 | MODULE_AUTHOR("Thomas Bogendoerfer"); | |
45 | MODULE_DESCRIPTION("i82596 driver"); | |
46 | MODULE_LICENSE("GPL"); | |
72abb461 | 47 | MODULE_ALIAS("platform:snirm_82596"); |
f2ec8030 TB |
48 | module_param(i596_debug, int, 0); |
49 | MODULE_PARM_DESC(i596_debug, "82596 debug mask"); | |
50 | ||
51 | static inline void ca(struct net_device *dev) | |
52 | { | |
53 | struct i596_private *lp = netdev_priv(dev); | |
54 | ||
55 | writel(0, lp->ca); | |
56 | } | |
57 | ||
58 | ||
59 | static void mpu_port(struct net_device *dev, int c, dma_addr_t x) | |
60 | { | |
61 | struct i596_private *lp = netdev_priv(dev); | |
62 | ||
63 | u32 v = (u32) (c) | (u32) (x); | |
64 | ||
65 | if (lp->options & OPT_MPU_16BIT) { | |
66 | writew(v & 0xffff, lp->mpu_port); | |
67 | wmb(); /* order writes to MPU port */ | |
68 | udelay(1); | |
69 | writew(v >> 16, lp->mpu_port); | |
70 | } else { | |
71 | writel(v, lp->mpu_port); | |
72 | wmb(); /* order writes to MPU port */ | |
73 | udelay(1); | |
74 | writel(v, lp->mpu_port); | |
75 | } | |
76 | } | |
77 | ||
78 | ||
79 | static int __devinit sni_82596_probe(struct platform_device *dev) | |
80 | { | |
81 | struct net_device *netdevice; | |
82 | struct i596_private *lp; | |
83 | struct resource *res, *ca, *idprom, *options; | |
84 | int retval = -ENOMEM; | |
85 | void __iomem *mpu_addr; | |
86 | void __iomem *ca_addr; | |
87 | u8 __iomem *eth_addr; | |
88 | ||
89 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
90 | ca = platform_get_resource(dev, IORESOURCE_MEM, 1); | |
91 | options = platform_get_resource(dev, 0, 0); | |
92 | idprom = platform_get_resource(dev, IORESOURCE_MEM, 2); | |
93 | if (!res || !ca || !options || !idprom) | |
94 | return -ENODEV; | |
95 | mpu_addr = ioremap_nocache(res->start, 4); | |
96 | if (!mpu_addr) | |
97 | return -ENOMEM; | |
98 | ca_addr = ioremap_nocache(ca->start, 4); | |
99 | if (!ca_addr) | |
100 | goto probe_failed_free_mpu; | |
101 | ||
102 | printk(KERN_INFO "Found i82596 at 0x%x\n", res->start); | |
103 | ||
104 | netdevice = alloc_etherdev(sizeof(struct i596_private)); | |
105 | if (!netdevice) | |
106 | goto probe_failed_free_ca; | |
107 | ||
108 | SET_NETDEV_DEV(netdevice, &dev->dev); | |
109 | platform_set_drvdata (dev, netdevice); | |
110 | ||
111 | netdevice->base_addr = res->start; | |
112 | netdevice->irq = platform_get_irq(dev, 0); | |
113 | ||
114 | eth_addr = ioremap_nocache(idprom->start, 0x10); | |
115 | if (!eth_addr) | |
116 | goto probe_failed; | |
117 | ||
118 | /* someone seems to like messed up stuff */ | |
119 | netdevice->dev_addr[0] = readb(eth_addr + 0x0b); | |
120 | netdevice->dev_addr[1] = readb(eth_addr + 0x0a); | |
121 | netdevice->dev_addr[2] = readb(eth_addr + 0x09); | |
122 | netdevice->dev_addr[3] = readb(eth_addr + 0x08); | |
123 | netdevice->dev_addr[4] = readb(eth_addr + 0x07); | |
124 | netdevice->dev_addr[5] = readb(eth_addr + 0x06); | |
125 | iounmap(eth_addr); | |
126 | ||
127 | if (!netdevice->irq) { | |
128 | printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n", | |
129 | __FILE__, netdevice->base_addr); | |
130 | goto probe_failed; | |
131 | } | |
132 | ||
133 | lp = netdev_priv(netdevice); | |
134 | lp->options = options->flags & IORESOURCE_BITS; | |
135 | lp->ca = ca_addr; | |
136 | lp->mpu_port = mpu_addr; | |
137 | ||
138 | retval = i82596_probe(netdevice); | |
139 | if (retval == 0) | |
140 | return 0; | |
141 | ||
142 | probe_failed: | |
143 | free_netdev(netdevice); | |
144 | probe_failed_free_ca: | |
145 | iounmap(ca_addr); | |
146 | probe_failed_free_mpu: | |
147 | iounmap(mpu_addr); | |
148 | return retval; | |
149 | } | |
150 | ||
151 | static int __devexit sni_82596_driver_remove(struct platform_device *pdev) | |
152 | { | |
153 | struct net_device *dev = platform_get_drvdata(pdev); | |
154 | struct i596_private *lp = netdev_priv(dev); | |
155 | ||
156 | unregister_netdev(dev); | |
157 | DMA_FREE(dev->dev.parent, sizeof(struct i596_private), | |
158 | lp->dma, lp->dma_addr); | |
159 | iounmap(lp->ca); | |
160 | iounmap(lp->mpu_port); | |
161 | free_netdev (dev); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static struct platform_driver sni_82596_driver = { | |
166 | .probe = sni_82596_probe, | |
167 | .remove = __devexit_p(sni_82596_driver_remove), | |
168 | .driver = { | |
169 | .name = sni_82596_string, | |
72abb461 | 170 | .owner = THIS_MODULE, |
f2ec8030 TB |
171 | }, |
172 | }; | |
173 | ||
174 | static int __devinit sni_82596_init(void) | |
175 | { | |
176 | printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n"); | |
177 | return platform_driver_register(&sni_82596_driver); | |
178 | } | |
179 | ||
180 | ||
181 | static void __exit sni_82596_exit(void) | |
182 | { | |
183 | platform_driver_unregister(&sni_82596_driver); | |
184 | } | |
185 | ||
186 | module_init(sni_82596_init); | |
187 | module_exit(sni_82596_exit); |