1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * jazzsonic.c |
4 | * |
5 | * (C) 2005 Finn Thain |
6 | * |
7 | * Converted to DMA API, and (from the mac68k project) introduced |
8 | * dhd's support for 16-bit cards. |
9 | * |
10 | * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) |
11 | * |
12 | * This driver is based on work from Andreas Busse, but most of |
13 | * the code is rewritten. |
14 | * |
15 | * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) |
16 | * |
17 | * A driver for the onboard Sonic ethernet controller on Mips Jazz |
18 | * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and |
19 | * perhaps others, too) |
20 | */ |
21 | |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> |
24 | #include <linux/types.h> |
25 | #include <linux/fcntl.h> |
26 | #include <linux/gfp.h> |
27 | #include <linux/interrupt.h> |
28 | #include <linux/ioport.h> |
29 | #include <linux/in.h> |
30 | #include <linux/string.h> |
31 | #include <linux/delay.h> |
32 | #include <linux/errno.h> |
33 | #include <linux/netdevice.h> |
34 | #include <linux/etherdevice.h> |
35 | #include <linux/skbuff.h> |
36 | #include <linux/platform_device.h> |
37 | #include <linux/dma-mapping.h> |
38 | #include <linux/slab.h> |
39 | #include <linux/pgtable.h> |
40 | |
41 | #include <asm/bootinfo.h> |
42 | #include <asm/io.h> |
43 | #include <asm/dma.h> |
44 | #include <asm/jazz.h> |
45 | #include <asm/jazzdma.h> |
46 | |
47 | static char jazz_sonic_string[] = "jazzsonic" ; |
48 | |
49 | #define SONIC_MEM_SIZE 0x100 |
50 | |
51 | #include "sonic.h" |
52 | |
53 | /* |
54 | * Macros to access SONIC registers |
55 | */ |
56 | #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg)) |
57 | |
58 | #define SONIC_WRITE(reg,val) \ |
59 | do { \ |
60 | *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \ |
61 | } while (0) |
62 | |
63 | /* |
64 | * We cannot use station (ethernet) address prefixes to detect the |
65 | * sonic controller since these are board manufacturer depended. |
66 | * So we check for known Silicon Revision IDs instead. |
67 | */ |
68 | static unsigned short known_revisions[] = |
69 | { |
70 | 0x04, /* Mips Magnum 4000 */ |
71 | 0xffff /* end of list */ |
72 | }; |
73 | |
74 | static int jazzsonic_open(struct net_device* dev) |
75 | { |
76 | int retval; |
77 | |
78 | retval = request_irq(irq: dev->irq, handler: sonic_interrupt, flags: 0, name: "sonic" , dev); |
79 | if (retval) { |
80 | printk(KERN_ERR "%s: unable to get IRQ %d.\n" , |
81 | dev->name, dev->irq); |
82 | return retval; |
83 | } |
84 | |
85 | retval = sonic_open(dev); |
86 | if (retval) |
87 | free_irq(dev->irq, dev); |
88 | return retval; |
89 | } |
90 | |
91 | static int jazzsonic_close(struct net_device* dev) |
92 | { |
93 | int err; |
94 | err = sonic_close(dev); |
95 | free_irq(dev->irq, dev); |
96 | return err; |
97 | } |
98 | |
99 | static const struct net_device_ops sonic_netdev_ops = { |
100 | .ndo_open = jazzsonic_open, |
101 | .ndo_stop = jazzsonic_close, |
102 | .ndo_start_xmit = sonic_send_packet, |
103 | .ndo_get_stats = sonic_get_stats, |
104 | .ndo_set_rx_mode = sonic_multicast_list, |
105 | .ndo_tx_timeout = sonic_tx_timeout, |
106 | .ndo_validate_addr = eth_validate_addr, |
107 | .ndo_set_mac_address = eth_mac_addr, |
108 | }; |
109 | |
110 | static int sonic_probe1(struct net_device *dev) |
111 | { |
112 | unsigned int silicon_revision; |
113 | unsigned int val; |
114 | struct sonic_local *lp = netdev_priv(dev); |
115 | int err = -ENODEV; |
116 | int i; |
117 | unsigned char addr[ETH_ALEN]; |
118 | |
119 | if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) |
120 | return -EBUSY; |
121 | |
122 | /* |
123 | * get the Silicon Revision ID. If this is one of the known |
124 | * one assume that we found a SONIC ethernet controller at |
125 | * the expected location. |
126 | */ |
127 | silicon_revision = SONIC_READ(SONIC_SR); |
128 | i = 0; |
129 | while (known_revisions[i] != 0xffff && |
130 | known_revisions[i] != silicon_revision) |
131 | i++; |
132 | |
133 | if (known_revisions[i] == 0xffff) { |
134 | pr_info("SONIC ethernet controller not found (0x%4x)\n" , |
135 | silicon_revision); |
136 | goto out; |
137 | } |
138 | |
139 | /* |
140 | * Put the sonic into software reset, then |
141 | * retrieve and print the ethernet address. |
142 | */ |
143 | SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); |
144 | SONIC_WRITE(SONIC_CEP,0); |
145 | for (i=0; i<3; i++) { |
146 | val = SONIC_READ(SONIC_CAP0-i); |
147 | addr[i*2] = val; |
148 | addr[i*2+1] = val >> 8; |
149 | } |
150 | eth_hw_addr_set(dev, addr); |
151 | |
152 | lp->dma_bitmode = SONIC_BITMODE32; |
153 | |
154 | err = sonic_alloc_descriptors(dev); |
155 | if (err) |
156 | goto out; |
157 | |
158 | dev->netdev_ops = &sonic_netdev_ops; |
159 | dev->watchdog_timeo = TX_TIMEOUT; |
160 | |
161 | /* |
162 | * clear tally counter |
163 | */ |
164 | SONIC_WRITE(SONIC_CRCT,0xffff); |
165 | SONIC_WRITE(SONIC_FAET,0xffff); |
166 | SONIC_WRITE(SONIC_MPT,0xffff); |
167 | |
168 | return 0; |
169 | out: |
170 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
171 | return err; |
172 | } |
173 | |
174 | /* |
175 | * Probe for a SONIC ethernet controller on a Mips Jazz board. |
176 | * Actually probing is superfluous but we're paranoid. |
177 | */ |
178 | static int jazz_sonic_probe(struct platform_device *pdev) |
179 | { |
180 | struct net_device *dev; |
181 | struct sonic_local *lp; |
182 | struct resource *res; |
183 | int err = 0; |
184 | |
185 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
186 | if (!res) |
187 | return -ENODEV; |
188 | |
189 | dev = alloc_etherdev(sizeof(struct sonic_local)); |
190 | if (!dev) |
191 | return -ENOMEM; |
192 | |
193 | lp = netdev_priv(dev); |
194 | lp->device = &pdev->dev; |
195 | SET_NETDEV_DEV(dev, &pdev->dev); |
196 | platform_set_drvdata(pdev, data: dev); |
197 | |
198 | dev->base_addr = res->start; |
199 | dev->irq = platform_get_irq(pdev, 0); |
200 | err = sonic_probe1(dev); |
201 | if (err) |
202 | goto out; |
203 | |
204 | pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n" , |
205 | dev->base_addr, dev->dev_addr, dev->irq); |
206 | |
207 | sonic_msg_init(dev); |
208 | |
209 | err = register_netdev(dev); |
210 | if (err) |
211 | goto undo_probe1; |
212 | |
213 | return 0; |
214 | |
215 | undo_probe1: |
216 | dma_free_coherent(dev: lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), |
217 | cpu_addr: lp->descriptors, dma_handle: lp->descriptors_laddr); |
218 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
219 | out: |
220 | free_netdev(dev); |
221 | |
222 | return err; |
223 | } |
224 | |
225 | MODULE_DESCRIPTION("Jazz SONIC ethernet driver" ); |
226 | MODULE_ALIAS("platform:jazzsonic" ); |
227 | |
228 | #include "sonic.c" |
229 | |
230 | static void jazz_sonic_device_remove(struct platform_device *pdev) |
231 | { |
232 | struct net_device *dev = platform_get_drvdata(pdev); |
233 | struct sonic_local* lp = netdev_priv(dev); |
234 | |
235 | unregister_netdev(dev); |
236 | dma_free_coherent(dev: lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), |
237 | cpu_addr: lp->descriptors, dma_handle: lp->descriptors_laddr); |
238 | release_mem_region(dev->base_addr, SONIC_MEM_SIZE); |
239 | free_netdev(dev); |
240 | } |
241 | |
242 | static struct platform_driver jazz_sonic_driver = { |
243 | .probe = jazz_sonic_probe, |
244 | .remove_new = jazz_sonic_device_remove, |
245 | .driver = { |
246 | .name = jazz_sonic_string, |
247 | }, |
248 | }; |
249 | |
250 | module_platform_driver(jazz_sonic_driver); |
251 | |