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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sni_82596.c -- driver for intel 82596 ethernet controller, as
4 * used in older SNI RM machines
5 */
6
7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/string.h>
10#include <linux/errno.h>
11#include <linux/ioport.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/types.h>
18#include <linux/bitops.h>
19#include <linux/platform_device.h>
20#include <linux/io.h>
21#include <linux/irq.h>
22
23#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
24
25static const char sni_82596_string[] = "snirm_82596";
26
27#define SYSBUS 0x00004400
28
29/* big endian CPU, 82596 little endian */
30#define SWAP32(x) cpu_to_le32((u32)(x))
31#define SWAP16(x) cpu_to_le16((u16)(x))
32
33#define OPT_MPU_16BIT 0x01
34
35#include "lib82596.c"
36
37MODULE_AUTHOR("Thomas Bogendoerfer");
38MODULE_DESCRIPTION("i82596 driver");
39MODULE_LICENSE("GPL");
40MODULE_ALIAS("platform:snirm_82596");
41module_param(i596_debug, int, 0);
42MODULE_PARM_DESC(i596_debug, "82596 debug mask");
43
44static inline void ca(struct net_device *dev)
45{
46 struct i596_private *lp = netdev_priv(dev);
47
48 writel(0, lp->ca);
49}
50
51
52static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
53{
54 struct i596_private *lp = netdev_priv(dev);
55
56 u32 v = (u32) (c) | (u32) (x);
57
58 if (lp->options & OPT_MPU_16BIT) {
59 writew(v & 0xffff, lp->mpu_port);
60 wmb(); /* order writes to MPU port */
61 udelay(1);
62 writew(v >> 16, lp->mpu_port);
63 } else {
64 writel(v, lp->mpu_port);
65 wmb(); /* order writes to MPU port */
66 udelay(1);
67 writel(v, lp->mpu_port);
68 }
69}
70
71
72static int sni_82596_probe(struct platform_device *dev)
73{
74 struct net_device *netdevice;
75 struct i596_private *lp;
76 struct resource *res, *ca, *idprom, *options;
77 int retval = -ENOMEM;
78 void __iomem *mpu_addr;
79 void __iomem *ca_addr;
80 u8 __iomem *eth_addr;
81 u8 mac[ETH_ALEN];
82
83 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
84 ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
85 options = platform_get_resource(dev, 0, 0);
86 idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
87 if (!res || !ca || !options || !idprom)
88 return -ENODEV;
89 mpu_addr = ioremap(res->start, 4);
90 if (!mpu_addr)
91 return -ENOMEM;
92 ca_addr = ioremap(ca->start, 4);
93 if (!ca_addr)
94 goto probe_failed_free_mpu;
95
96 printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
97
98 netdevice = alloc_etherdev(sizeof(struct i596_private));
99 if (!netdevice)
100 goto probe_failed_free_ca;
101
102 SET_NETDEV_DEV(netdevice, &dev->dev);
103 platform_set_drvdata (dev, netdevice);
104
105 netdevice->base_addr = res->start;
106 netdevice->irq = platform_get_irq(dev, 0);
107
108 eth_addr = ioremap(idprom->start, 0x10);
109 if (!eth_addr)
110 goto probe_failed;
111
112 /* someone seems to like messed up stuff */
113 mac[0] = readb(eth_addr + 0x0b);
114 mac[1] = readb(eth_addr + 0x0a);
115 mac[2] = readb(eth_addr + 0x09);
116 mac[3] = readb(eth_addr + 0x08);
117 mac[4] = readb(eth_addr + 0x07);
118 mac[5] = readb(eth_addr + 0x06);
119 eth_hw_addr_set(netdevice, mac);
120 iounmap(eth_addr);
121
122 if (netdevice->irq < 0) {
123 printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
124 __FILE__, netdevice->base_addr);
125 retval = netdevice->irq;
126 goto probe_failed;
127 }
128
129 lp = netdev_priv(netdevice);
130 lp->options = options->flags & IORESOURCE_BITS;
131 lp->ca = ca_addr;
132 lp->mpu_port = mpu_addr;
133
134 lp->dma = dma_alloc_coherent(&dev->dev, sizeof(struct i596_dma),
135 &lp->dma_addr, GFP_KERNEL);
136 if (!lp->dma)
137 goto probe_failed;
138
139 retval = i82596_probe(netdevice);
140 if (retval)
141 goto probe_failed_free_dma;
142 return 0;
143
144probe_failed_free_dma:
145 dma_free_coherent(&dev->dev, sizeof(struct i596_dma), lp->dma,
146 lp->dma_addr);
147probe_failed:
148 free_netdev(netdevice);
149probe_failed_free_ca:
150 iounmap(ca_addr);
151probe_failed_free_mpu:
152 iounmap(mpu_addr);
153 return retval;
154}
155
156static void sni_82596_driver_remove(struct platform_device *pdev)
157{
158 struct net_device *dev = platform_get_drvdata(pdev);
159 struct i596_private *lp = netdev_priv(dev);
160
161 unregister_netdev(dev);
162 dma_free_coherent(&pdev->dev, sizeof(struct i596_private), lp->dma,
163 lp->dma_addr);
164 iounmap(lp->ca);
165 iounmap(lp->mpu_port);
166 free_netdev (dev);
167}
168
169static struct platform_driver sni_82596_driver = {
170 .probe = sni_82596_probe,
171 .remove = sni_82596_driver_remove,
172 .driver = {
173 .name = sni_82596_string,
174 },
175};
176
177static int sni_82596_init(void)
178{
179 printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
180 return platform_driver_register(&sni_82596_driver);
181}
182
183
184static void __exit sni_82596_exit(void)
185{
186 platform_driver_unregister(&sni_82596_driver);
187}
188
189module_init(sni_82596_init);
190module_exit(sni_82596_exit);
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/interrupt.h>
12#include <linux/delay.h>
13#include <linux/netdevice.h>
14#include <linux/etherdevice.h>
15#include <linux/skbuff.h>
16#include <linux/types.h>
17#include <linux/bitops.h>
18#include <linux/platform_device.h>
19#include <linux/io.h>
20#include <linux/irq.h>
21
22#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
23
24static const char sni_82596_string[] = "snirm_82596";
25
26#define DMA_ALLOC dma_alloc_coherent
27#define DMA_FREE dma_free_coherent
28#define DMA_WBACK(priv, addr, len) do { } while (0)
29#define DMA_INV(priv, addr, len) do { } while (0)
30#define DMA_WBACK_INV(priv, addr, len) do { } while (0)
31
32#define SYSBUS 0x00004400
33
34/* big endian CPU, 82596 little endian */
35#define SWAP32(x) cpu_to_le32((u32)(x))
36#define SWAP16(x) cpu_to_le16((u16)(x))
37
38#define OPT_MPU_16BIT 0x01
39
40#include "lib82596.c"
41
42MODULE_AUTHOR("Thomas Bogendoerfer");
43MODULE_DESCRIPTION("i82596 driver");
44MODULE_LICENSE("GPL");
45MODULE_ALIAS("platform:snirm_82596");
46module_param(i596_debug, int, 0);
47MODULE_PARM_DESC(i596_debug, "82596 debug mask");
48
49static inline void ca(struct net_device *dev)
50{
51 struct i596_private *lp = netdev_priv(dev);
52
53 writel(0, lp->ca);
54}
55
56
57static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
58{
59 struct i596_private *lp = netdev_priv(dev);
60
61 u32 v = (u32) (c) | (u32) (x);
62
63 if (lp->options & OPT_MPU_16BIT) {
64 writew(v & 0xffff, lp->mpu_port);
65 wmb(); /* order writes to MPU port */
66 udelay(1);
67 writew(v >> 16, lp->mpu_port);
68 } else {
69 writel(v, lp->mpu_port);
70 wmb(); /* order writes to MPU port */
71 udelay(1);
72 writel(v, lp->mpu_port);
73 }
74}
75
76
77static int sni_82596_probe(struct platform_device *dev)
78{
79 struct net_device *netdevice;
80 struct i596_private *lp;
81 struct resource *res, *ca, *idprom, *options;
82 int retval = -ENOMEM;
83 void __iomem *mpu_addr;
84 void __iomem *ca_addr;
85 u8 __iomem *eth_addr;
86
87 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
88 ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
89 options = platform_get_resource(dev, 0, 0);
90 idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
91 if (!res || !ca || !options || !idprom)
92 return -ENODEV;
93 mpu_addr = ioremap_nocache(res->start, 4);
94 if (!mpu_addr)
95 return -ENOMEM;
96 ca_addr = ioremap_nocache(ca->start, 4);
97 if (!ca_addr)
98 goto probe_failed_free_mpu;
99
100 printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
101
102 netdevice = alloc_etherdev(sizeof(struct i596_private));
103 if (!netdevice)
104 goto probe_failed_free_ca;
105
106 SET_NETDEV_DEV(netdevice, &dev->dev);
107 platform_set_drvdata (dev, netdevice);
108
109 netdevice->base_addr = res->start;
110 netdevice->irq = platform_get_irq(dev, 0);
111
112 eth_addr = ioremap_nocache(idprom->start, 0x10);
113 if (!eth_addr)
114 goto probe_failed;
115
116 /* someone seems to like messed up stuff */
117 netdevice->dev_addr[0] = readb(eth_addr + 0x0b);
118 netdevice->dev_addr[1] = readb(eth_addr + 0x0a);
119 netdevice->dev_addr[2] = readb(eth_addr + 0x09);
120 netdevice->dev_addr[3] = readb(eth_addr + 0x08);
121 netdevice->dev_addr[4] = readb(eth_addr + 0x07);
122 netdevice->dev_addr[5] = readb(eth_addr + 0x06);
123 iounmap(eth_addr);
124
125 if (!netdevice->irq) {
126 printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
127 __FILE__, netdevice->base_addr);
128 goto probe_failed;
129 }
130
131 lp = netdev_priv(netdevice);
132 lp->options = options->flags & IORESOURCE_BITS;
133 lp->ca = ca_addr;
134 lp->mpu_port = mpu_addr;
135
136 retval = i82596_probe(netdevice);
137 if (retval == 0)
138 return 0;
139
140probe_failed:
141 free_netdev(netdevice);
142probe_failed_free_ca:
143 iounmap(ca_addr);
144probe_failed_free_mpu:
145 iounmap(mpu_addr);
146 return retval;
147}
148
149static int sni_82596_driver_remove(struct platform_device *pdev)
150{
151 struct net_device *dev = platform_get_drvdata(pdev);
152 struct i596_private *lp = netdev_priv(dev);
153
154 unregister_netdev(dev);
155 DMA_FREE(dev->dev.parent, sizeof(struct i596_private),
156 lp->dma, lp->dma_addr);
157 iounmap(lp->ca);
158 iounmap(lp->mpu_port);
159 free_netdev (dev);
160 return 0;
161}
162
163static struct platform_driver sni_82596_driver = {
164 .probe = sni_82596_probe,
165 .remove = sni_82596_driver_remove,
166 .driver = {
167 .name = sni_82596_string,
168 },
169};
170
171static int sni_82596_init(void)
172{
173 printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
174 return platform_driver_register(&sni_82596_driver);
175}
176
177
178static void __exit sni_82596_exit(void)
179{
180 platform_driver_unregister(&sni_82596_driver);
181}
182
183module_init(sni_82596_init);
184module_exit(sni_82596_exit);