1 /*
2 * Embedded Planet EP8248E support
3 *
4 * Copyright 2007 Freescale Semiconductor, Inc.
5 * Author: Scott Wood <scottwood@freescale.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/fsl_devices.h>
16 #include <linux/mdio-bitbang.h>
17 #include <linux/of_mdio.h>
18 #include <linux/slab.h>
19 #include <linux/of_platform.h>
20
21 #include <asm/io.h>
22 #include <asm/cpm2.h>
23 #include <asm/udbg.h>
24 #include <asm/machdep.h>
25 #include <asm/time.h>
26 #include <asm/mpc8260.h>
27 #include <asm/prom.h>
28
29 #include <sysdev/fsl_soc.h>
30 #include <sysdev/cpm2_pic.h>
31
32 #include "pq2.h"
33
34 static u8 __iomem *ep8248e_bcsr;
35 static struct device_node *ep8248e_bcsr_node;
36
37 #define BCSR7_SCC2_ENABLE 0x10
38
39 #define BCSR8_PHY1_ENABLE 0x80
40 #define BCSR8_PHY1_POWER 0x40
41 #define BCSR8_PHY2_ENABLE 0x20
42 #define BCSR8_PHY2_POWER 0x10
43 #define BCSR8_MDIO_READ 0x04
44 #define BCSR8_MDIO_CLOCK 0x02
45 #define BCSR8_MDIO_DATA 0x01
46
47 #define BCSR9_USB_ENABLE 0x80
48 #define BCSR9_USB_POWER 0x40
49 #define BCSR9_USB_HOST 0x20
50 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
51
ep8248e_pic_init(void)52 static void __init ep8248e_pic_init(void)
53 {
54 struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
55 if (!np) {
56 printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
57 return;
58 }
59
60 cpm2_pic_init(np);
61 of_node_put(np);
62 }
63
ep8248e_set_mdc(struct mdiobb_ctrl * ctrl,int level)64 static void ep8248e_set_mdc(struct mdiobb_ctrl *ctrl, int level)
65 {
66 if (level)
67 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
68 else
69 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
70
71 /* Read back to flush the write. */
72 in_8(&ep8248e_bcsr[8]);
73 }
74
ep8248e_set_mdio_dir(struct mdiobb_ctrl * ctrl,int output)75 static void ep8248e_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
76 {
77 if (output)
78 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
79 else
80 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
81
82 /* Read back to flush the write. */
83 in_8(&ep8248e_bcsr[8]);
84 }
85
ep8248e_set_mdio_data(struct mdiobb_ctrl * ctrl,int data)86 static void ep8248e_set_mdio_data(struct mdiobb_ctrl *ctrl, int data)
87 {
88 if (data)
89 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
90 else
91 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
92
93 /* Read back to flush the write. */
94 in_8(&ep8248e_bcsr[8]);
95 }
96
ep8248e_get_mdio_data(struct mdiobb_ctrl * ctrl)97 static int ep8248e_get_mdio_data(struct mdiobb_ctrl *ctrl)
98 {
99 return in_8(&ep8248e_bcsr[8]) & BCSR8_MDIO_DATA;
100 }
101
102 static const struct mdiobb_ops ep8248e_mdio_ops = {
103 .set_mdc = ep8248e_set_mdc,
104 .set_mdio_dir = ep8248e_set_mdio_dir,
105 .set_mdio_data = ep8248e_set_mdio_data,
106 .get_mdio_data = ep8248e_get_mdio_data,
107 .owner = THIS_MODULE,
108 };
109
110 static struct mdiobb_ctrl ep8248e_mdio_ctrl = {
111 .ops = &ep8248e_mdio_ops,
112 };
113
ep8248e_mdio_probe(struct platform_device * ofdev)114 static int ep8248e_mdio_probe(struct platform_device *ofdev)
115 {
116 struct mii_bus *bus;
117 struct resource res;
118 struct device_node *node;
119 int ret;
120
121 node = of_get_parent(ofdev->dev.of_node);
122 of_node_put(node);
123 if (node != ep8248e_bcsr_node)
124 return -ENODEV;
125
126 ret = of_address_to_resource(ofdev->dev.of_node, 0, &res);
127 if (ret)
128 return ret;
129
130 bus = alloc_mdio_bitbang(&ep8248e_mdio_ctrl);
131 if (!bus)
132 return -ENOMEM;
133
134 bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
135 if (bus->irq == NULL) {
136 ret = -ENOMEM;
137 goto err_free_bus;
138 }
139
140 bus->name = "ep8248e-mdio-bitbang";
141 bus->parent = &ofdev->dev;
142 snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
143
144 ret = of_mdiobus_register(bus, ofdev->dev.of_node);
145 if (ret)
146 goto err_free_irq;
147
148 return 0;
149 err_free_irq:
150 kfree(bus->irq);
151 err_free_bus:
152 free_mdio_bitbang(bus);
153 return ret;
154 }
155
ep8248e_mdio_remove(struct platform_device * ofdev)156 static int ep8248e_mdio_remove(struct platform_device *ofdev)
157 {
158 BUG();
159 return 0;
160 }
161
162 static const struct of_device_id ep8248e_mdio_match[] = {
163 {
164 .compatible = "fsl,ep8248e-mdio-bitbang",
165 },
166 {},
167 };
168
169 static struct platform_driver ep8248e_mdio_driver = {
170 .driver = {
171 .name = "ep8248e-mdio-bitbang",
172 .owner = THIS_MODULE,
173 .of_match_table = ep8248e_mdio_match,
174 },
175 .probe = ep8248e_mdio_probe,
176 .remove = ep8248e_mdio_remove,
177 };
178
179 struct cpm_pin {
180 int port, pin, flags;
181 };
182
183 static __initdata struct cpm_pin ep8248e_pins[] = {
184 /* SMC1 */
185 {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
186 {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
187
188 /* SCC1 */
189 {2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
190 {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
191 {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
192 {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
193 {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
194
195 /* FCC1 */
196 {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
197 {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
198 {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
199 {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
200 {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
201 {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
202 {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
203 {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
204 {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
205 {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
206 {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
207 {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
208 {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
209 {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
210 {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
211 {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
212
213 /* FCC2 */
214 {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
215 {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
216 {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
217 {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
218 {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
219 {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
220 {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
221 {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
222 {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
223 {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
224 {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
225 {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
226 {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
227 {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
228 {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
229 {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
230
231 /* I2C */
232 {4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
233 {4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
234
235 /* USB */
236 {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
237 {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
238 {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
239 {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
240 {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
241 {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
242 {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
243 };
244
init_ioports(void)245 static void __init init_ioports(void)
246 {
247 int i;
248
249 for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
250 const struct cpm_pin *pin = &ep8248e_pins[i];
251 cpm2_set_pin(pin->port, pin->pin, pin->flags);
252 }
253
254 cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
255 cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
256 cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
257 cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
258 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
259 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
260 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
261 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
262 }
263
ep8248e_setup_arch(void)264 static void __init ep8248e_setup_arch(void)
265 {
266 if (ppc_md.progress)
267 ppc_md.progress("ep8248e_setup_arch()", 0);
268
269 cpm2_reset();
270
271 /* When this is set, snooping CPM DMA from RAM causes
272 * machine checks. See erratum SIU18.
273 */
274 clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
275
276 ep8248e_bcsr_node =
277 of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
278 if (!ep8248e_bcsr_node) {
279 printk(KERN_ERR "No bcsr in device tree\n");
280 return;
281 }
282
283 ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
284 if (!ep8248e_bcsr) {
285 printk(KERN_ERR "Cannot map BCSR registers\n");
286 of_node_put(ep8248e_bcsr_node);
287 ep8248e_bcsr_node = NULL;
288 return;
289 }
290
291 setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
292 setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
293 BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
294
295 init_ioports();
296
297 if (ppc_md.progress)
298 ppc_md.progress("ep8248e_setup_arch(), finish", 0);
299 }
300
301 static const struct of_device_id of_bus_ids[] __initconst = {
302 { .compatible = "simple-bus", },
303 { .compatible = "fsl,ep8248e-bcsr", },
304 {},
305 };
306
declare_of_platform_devices(void)307 static int __init declare_of_platform_devices(void)
308 {
309 of_platform_bus_probe(NULL, of_bus_ids, NULL);
310 platform_driver_register(&ep8248e_mdio_driver);
311
312 return 0;
313 }
314 machine_device_initcall(ep8248e, declare_of_platform_devices);
315
316 /*
317 * Called very early, device-tree isn't unflattened
318 */
ep8248e_probe(void)319 static int __init ep8248e_probe(void)
320 {
321 unsigned long root = of_get_flat_dt_root();
322 return of_flat_dt_is_compatible(root, "fsl,ep8248e");
323 }
324
define_machine(ep8248e)325 define_machine(ep8248e)
326 {
327 .name = "Embedded Planet EP8248E",
328 .probe = ep8248e_probe,
329 .setup_arch = ep8248e_setup_arch,
330 .init_IRQ = ep8248e_pic_init,
331 .get_irq = cpm2_get_irq,
332 .calibrate_decr = generic_calibrate_decr,
333 .restart = pq2_restart,
334 .progress = udbg_progress,
335 };
336