2 * Helper functions for the PM3386s on the Radisys ENP2611
3 * Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
4 * Dedicated to Marija Kulikova.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/netdevice.h>
19 * Read from register 'reg' of PM3386 device 'pm'.
21 static u16 pm3386_reg_read(int pm, int reg)
26 _reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
28 _reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
30 value = *((volatile u16 *)(_reg + (reg << 1)));
32 // printk(KERN_INFO "pm3386_reg_read(%d, %.3x) = %.8x\n", pm, reg, value);
38 * Write to register 'reg' of PM3386 device 'pm', and perform
39 * a readback from the identification register.
41 static void pm3386_reg_write(int pm, int reg, u16 value)
46 // printk(KERN_INFO "pm3386_reg_write(%d, %.3x, %.8x)\n", pm, reg, value);
48 _reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
50 _reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
52 *((volatile u16 *)(_reg + (reg << 1))) = value;
54 dummy = *((volatile u16 *)_reg);
55 __asm__ __volatile__("mov %0, %0" : "+r" (dummy));
59 * Read from port 'port' register 'reg', where the registers
60 * for the different ports are 'spacing' registers apart.
62 static u16 pm3386_port_reg_read(int port, int _reg, int spacing)
70 return pm3386_reg_read(port >> 1, reg);
74 * Write to port 'port' register 'reg', where the registers
75 * for the different ports are 'spacing' registers apart.
77 static void pm3386_port_reg_write(int port, int _reg, int spacing, u16 value)
85 pm3386_reg_write(port >> 1, reg, value);
88 int pm3386_secondary_present(void)
90 return pm3386_reg_read(1, 0) == 0x3386;
93 void pm3386_reset(void)
98 secondary = pm3386_secondary_present();
100 /* Save programmed MAC addresses. */
101 pm3386_get_mac(0, mac[0]);
102 pm3386_get_mac(1, mac[1]);
104 pm3386_get_mac(2, mac[2]);
106 /* Assert analog and digital reset. */
107 pm3386_reg_write(0, 0x002, 0x0060);
109 pm3386_reg_write(1, 0x002, 0x0060);
112 /* Deassert analog reset. */
113 pm3386_reg_write(0, 0x002, 0x0062);
115 pm3386_reg_write(1, 0x002, 0x0062);
118 /* Deassert digital reset. */
119 pm3386_reg_write(0, 0x002, 0x0063);
121 pm3386_reg_write(1, 0x002, 0x0063);
124 /* Restore programmed MAC addresses. */
125 pm3386_set_mac(0, mac[0]);
126 pm3386_set_mac(1, mac[1]);
128 pm3386_set_mac(2, mac[2]);
130 /* Disable carrier on all ports. */
131 pm3386_set_carrier(0, 0);
132 pm3386_set_carrier(1, 0);
134 pm3386_set_carrier(2, 0);
137 static u16 swaph(u16 x)
139 return ((x << 8) | (x >> 8)) & 0xffff;
142 int pm3386_port_count(void)
144 return 2 + pm3386_secondary_present();
147 void pm3386_init_port(int port)
152 * Work around ENP2611 bootloader programming MAC address
155 if (pm3386_port_reg_read(port, 0x30a, 0x100) == 0x0000 &&
156 (pm3386_port_reg_read(port, 0x309, 0x100) & 0xff00) == 0x5000) {
159 temp[0] = pm3386_port_reg_read(port, 0x308, 0x100);
160 temp[1] = pm3386_port_reg_read(port, 0x309, 0x100);
161 temp[2] = pm3386_port_reg_read(port, 0x30a, 0x100);
162 pm3386_port_reg_write(port, 0x308, 0x100, swaph(temp[2]));
163 pm3386_port_reg_write(port, 0x309, 0x100, swaph(temp[1]));
164 pm3386_port_reg_write(port, 0x30a, 0x100, swaph(temp[0]));
168 * Initialise narrowbanding mode. See application note 2010486
169 * for more information. (@@@ We also need to issue a reset
170 * when ROOL or DOOL are detected.)
172 pm3386_port_reg_write(port, 0x708, 0x10, 0xd055);
174 pm3386_port_reg_write(port, 0x708, 0x10, 0x5055);
177 * SPI-3 ingress block. Set 64 bytes SPI-3 burst size
178 * towards SPI-3 bridge.
180 pm3386_port_reg_write(port, 0x122, 0x20, 0x0002);
183 * Enable ingress protocol checking, and soft reset the
184 * SPI-3 ingress block.
186 pm3386_reg_write(pm, 0x103, 0x0003);
187 while (!(pm3386_reg_read(pm, 0x103) & 0x80))
191 * SPI-3 egress block. Gather 12288 bytes of the current
192 * packet in the TX fifo before initiating transmit on the
193 * SERDES interface. (Prevents TX underflows.)
195 pm3386_port_reg_write(port, 0x221, 0x20, 0x0007);
198 * Enforce odd parity from the SPI-3 bridge, and soft reset
199 * the SPI-3 egress block.
201 pm3386_reg_write(pm, 0x203, 0x000d & ~(4 << (port & 1)));
202 while ((pm3386_reg_read(pm, 0x203) & 0x000c) != 0x000c)
206 * EGMAC block. Set this channels to reject long preambles,
207 * not send or transmit PAUSE frames, enable preamble checking,
208 * disable frame length checking, enable FCS appending, enable
211 pm3386_port_reg_write(port, 0x302, 0x100, 0x0113);
214 * Soft reset the EGMAC block.
216 pm3386_port_reg_write(port, 0x301, 0x100, 0x8000);
217 pm3386_port_reg_write(port, 0x301, 0x100, 0x0000);
220 * Auto-sense autonegotiation status.
222 pm3386_port_reg_write(port, 0x306, 0x100, 0x0100);
225 * Allow reception of jumbo frames.
227 pm3386_port_reg_write(port, 0x310, 0x100, 9018);
230 * Allow transmission of jumbo frames.
232 pm3386_port_reg_write(port, 0x336, 0x100, 9018);
234 /* @@@ Should set 0x337/0x437 (RX forwarding threshold.) */
237 * Set autonegotiation parameters to 'no PAUSE, full duplex.'
239 pm3386_port_reg_write(port, 0x31c, 0x100, 0x0020);
242 * Enable and restart autonegotiation.
244 pm3386_port_reg_write(port, 0x318, 0x100, 0x0003);
245 pm3386_port_reg_write(port, 0x318, 0x100, 0x0002);
248 void pm3386_get_mac(int port, u8 *mac)
252 temp = pm3386_port_reg_read(port, 0x308, 0x100);
253 mac[0] = temp & 0xff;
254 mac[1] = (temp >> 8) & 0xff;
256 temp = pm3386_port_reg_read(port, 0x309, 0x100);
257 mac[2] = temp & 0xff;
258 mac[3] = (temp >> 8) & 0xff;
260 temp = pm3386_port_reg_read(port, 0x30a, 0x100);
261 mac[4] = temp & 0xff;
262 mac[5] = (temp >> 8) & 0xff;
265 void pm3386_set_mac(int port, u8 *mac)
267 pm3386_port_reg_write(port, 0x308, 0x100, (mac[1] << 8) | mac[0]);
268 pm3386_port_reg_write(port, 0x309, 0x100, (mac[3] << 8) | mac[2]);
269 pm3386_port_reg_write(port, 0x30a, 0x100, (mac[5] << 8) | mac[4]);
272 static u32 pm3386_get_stat(int port, u16 base)
276 value = pm3386_port_reg_read(port, base, 0x100);
277 value |= pm3386_port_reg_read(port, base + 1, 0x100) << 16;
282 void pm3386_get_stats(int port, struct net_device_stats *stats)
285 * Snapshot statistics counters.
287 pm3386_port_reg_write(port, 0x500, 0x100, 0x0001);
288 while (pm3386_port_reg_read(port, 0x500, 0x100) & 0x0001)
291 memset(stats, 0, sizeof(*stats));
293 stats->rx_packets = pm3386_get_stat(port, 0x510);
294 stats->tx_packets = pm3386_get_stat(port, 0x590);
295 stats->rx_bytes = pm3386_get_stat(port, 0x514);
296 stats->tx_bytes = pm3386_get_stat(port, 0x594);
297 /* @@@ Add other stats. */
300 void pm3386_set_carrier(int port, int state)
302 pm3386_port_reg_write(port, 0x703, 0x10, state ? 0x1001 : 0x0000);
305 int pm3386_is_link_up(int port)
309 temp = pm3386_port_reg_read(port, 0x31a, 0x100);
310 temp = pm3386_port_reg_read(port, 0x31a, 0x100);
312 return !!(temp & 0x0002);
315 void pm3386_enable_rx(int port)
319 temp = pm3386_port_reg_read(port, 0x303, 0x100);
321 pm3386_port_reg_write(port, 0x303, 0x100, temp);
324 void pm3386_disable_rx(int port)
328 temp = pm3386_port_reg_read(port, 0x303, 0x100);
330 pm3386_port_reg_write(port, 0x303, 0x100, temp);
333 void pm3386_enable_tx(int port)
337 temp = pm3386_port_reg_read(port, 0x303, 0x100);
339 pm3386_port_reg_write(port, 0x303, 0x100, temp);
342 void pm3386_disable_tx(int port)
346 temp = pm3386_port_reg_read(port, 0x303, 0x100);
348 pm3386_port_reg_write(port, 0x303, 0x100, temp);
351 MODULE_LICENSE("GPL");