2 * Broadcom specific AMBA
5 * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
7 * Licensed under the GNU/GPL. See COPYING for details.
10 #include "bcma_private.h"
12 #include <linux/bcma/bcma.h>
13 #include <linux/bcma/bcma_regs.h>
14 #include <linux/pci.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/slab.h>
19 static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
22 * bcma_arch_register_fallback_sprom - Registers a method providing a
23 * fallback SPROM if no SPROM is found.
25 * @sprom_callback: The callback function.
27 * With this function the architecture implementation may register a
28 * callback handler which fills the SPROM data structure. The fallback is
29 * used for PCI based BCMA devices, where no valid SPROM can be found
30 * in the shadow registers and to provide the SPROM for SoCs where BCMA is
31 * to controll the system bus.
33 * This function is useful for weird architectures that have a half-assed
34 * BCMA device hardwired to their PCI bus.
36 * This function is available for architecture code, only. So it is not
39 int bcma_arch_register_fallback_sprom(int (*sprom_callback)(struct bcma_bus *bus,
40 struct ssb_sprom *out))
42 if (get_fallback_sprom)
44 get_fallback_sprom = sprom_callback;
49 static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
50 struct ssb_sprom *out)
54 if (!get_fallback_sprom) {
59 err = get_fallback_sprom(bus, out);
63 pr_debug("Using SPROM revision %d provided by"
64 " platform.\n", bus->sprom.revision);
67 pr_warn("Using fallback SPROM failed (err %d)\n", err);
71 /**************************************************
73 **************************************************/
75 static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom)
78 for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++)
79 sprom[i] = bcma_read16(bus->drv_cc.core,
83 /**************************************************
85 **************************************************/
87 static inline u8 bcma_crc8(u8 crc, u8 data)
89 /* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
90 static const u8 t[] = {
91 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
92 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
93 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
94 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
95 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
96 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
97 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
98 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
99 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
100 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
101 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
102 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
103 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
104 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
105 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
106 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
107 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
108 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
109 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
110 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
111 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
112 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
113 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
114 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
115 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
116 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
117 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
118 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
119 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
120 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
121 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
122 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
124 return t[crc ^ data];
127 static u8 bcma_sprom_crc(const u16 *sprom)
132 for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) {
133 crc = bcma_crc8(crc, sprom[word] & 0x00FF);
134 crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);
136 crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF);
142 static int bcma_sprom_check_crc(const u16 *sprom)
148 crc = bcma_sprom_crc(sprom);
149 tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC;
150 expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
151 if (crc != expected_crc)
157 static int bcma_sprom_valid(const u16 *sprom)
162 err = bcma_sprom_check_crc(sprom);
166 revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV;
167 if (revision != 8 && revision != 9) {
168 pr_err("Unsupported SPROM revision: %d\n", revision);
175 /**************************************************
177 **************************************************/
179 #define SPOFF(offset) ((offset) / sizeof(u16))
181 #define SPEX(_field, _offset, _mask, _shift) \
182 bus->sprom._field = ((sprom[SPOFF(_offset)] & (_mask)) >> (_shift))
184 static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)
188 u16 pwr_info_offset[] = {
189 SSB_SROM8_PWR_INFO_CORE0, SSB_SROM8_PWR_INFO_CORE1,
190 SSB_SROM8_PWR_INFO_CORE2, SSB_SROM8_PWR_INFO_CORE3
192 BUILD_BUG_ON(ARRAY_SIZE(pwr_info_offset) !=
193 ARRAY_SIZE(bus->sprom.core_pwr_info));
195 bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] &
196 SSB_SPROM_REVISION_REV;
198 for (i = 0; i < 3; i++) {
199 v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i];
200 *(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v);
203 SPEX(board_rev, SSB_SPROM8_BOARDREV, ~0, 0);
205 SPEX(txpid2g[0], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G0,
206 SSB_SPROM4_TXPID2G0_SHIFT);
207 SPEX(txpid2g[1], SSB_SPROM4_TXPID2G01, SSB_SPROM4_TXPID2G1,
208 SSB_SPROM4_TXPID2G1_SHIFT);
209 SPEX(txpid2g[2], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G2,
210 SSB_SPROM4_TXPID2G2_SHIFT);
211 SPEX(txpid2g[3], SSB_SPROM4_TXPID2G23, SSB_SPROM4_TXPID2G3,
212 SSB_SPROM4_TXPID2G3_SHIFT);
214 SPEX(txpid5gl[0], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL0,
215 SSB_SPROM4_TXPID5GL0_SHIFT);
216 SPEX(txpid5gl[1], SSB_SPROM4_TXPID5GL01, SSB_SPROM4_TXPID5GL1,
217 SSB_SPROM4_TXPID5GL1_SHIFT);
218 SPEX(txpid5gl[2], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL2,
219 SSB_SPROM4_TXPID5GL2_SHIFT);
220 SPEX(txpid5gl[3], SSB_SPROM4_TXPID5GL23, SSB_SPROM4_TXPID5GL3,
221 SSB_SPROM4_TXPID5GL3_SHIFT);
223 SPEX(txpid5g[0], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G0,
224 SSB_SPROM4_TXPID5G0_SHIFT);
225 SPEX(txpid5g[1], SSB_SPROM4_TXPID5G01, SSB_SPROM4_TXPID5G1,
226 SSB_SPROM4_TXPID5G1_SHIFT);
227 SPEX(txpid5g[2], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G2,
228 SSB_SPROM4_TXPID5G2_SHIFT);
229 SPEX(txpid5g[3], SSB_SPROM4_TXPID5G23, SSB_SPROM4_TXPID5G3,
230 SSB_SPROM4_TXPID5G3_SHIFT);
232 SPEX(txpid5gh[0], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH0,
233 SSB_SPROM4_TXPID5GH0_SHIFT);
234 SPEX(txpid5gh[1], SSB_SPROM4_TXPID5GH01, SSB_SPROM4_TXPID5GH1,
235 SSB_SPROM4_TXPID5GH1_SHIFT);
236 SPEX(txpid5gh[2], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH2,
237 SSB_SPROM4_TXPID5GH2_SHIFT);
238 SPEX(txpid5gh[3], SSB_SPROM4_TXPID5GH23, SSB_SPROM4_TXPID5GH3,
239 SSB_SPROM4_TXPID5GH3_SHIFT);
241 SPEX(boardflags_lo, SSB_SPROM8_BFLLO, ~0, 0);
242 SPEX(boardflags_hi, SSB_SPROM8_BFLHI, ~0, 0);
243 SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, ~0, 0);
244 SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, ~0, 0);
246 SPEX(country_code, SSB_SPROM8_CCODE, ~0, 0);
248 /* Extract cores power info info */
249 for (i = 0; i < ARRAY_SIZE(pwr_info_offset); i++) {
250 o = pwr_info_offset[i];
251 SPEX(core_pwr_info[i].itssi_2g, o + SSB_SROM8_2G_MAXP_ITSSI,
252 SSB_SPROM8_2G_ITSSI, SSB_SPROM8_2G_ITSSI_SHIFT);
253 SPEX(core_pwr_info[i].maxpwr_2g, o + SSB_SROM8_2G_MAXP_ITSSI,
254 SSB_SPROM8_2G_MAXP, 0);
256 SPEX(core_pwr_info[i].pa_2g[0], o + SSB_SROM8_2G_PA_0, ~0, 0);
257 SPEX(core_pwr_info[i].pa_2g[1], o + SSB_SROM8_2G_PA_1, ~0, 0);
258 SPEX(core_pwr_info[i].pa_2g[2], o + SSB_SROM8_2G_PA_2, ~0, 0);
260 SPEX(core_pwr_info[i].itssi_5g, o + SSB_SROM8_5G_MAXP_ITSSI,
261 SSB_SPROM8_5G_ITSSI, SSB_SPROM8_5G_ITSSI_SHIFT);
262 SPEX(core_pwr_info[i].maxpwr_5g, o + SSB_SROM8_5G_MAXP_ITSSI,
263 SSB_SPROM8_5G_MAXP, 0);
264 SPEX(core_pwr_info[i].maxpwr_5gh, o + SSB_SPROM8_5GHL_MAXP,
265 SSB_SPROM8_5GH_MAXP, 0);
266 SPEX(core_pwr_info[i].maxpwr_5gl, o + SSB_SPROM8_5GHL_MAXP,
267 SSB_SPROM8_5GL_MAXP, SSB_SPROM8_5GL_MAXP_SHIFT);
269 SPEX(core_pwr_info[i].pa_5gl[0], o + SSB_SROM8_5GL_PA_0, ~0, 0);
270 SPEX(core_pwr_info[i].pa_5gl[1], o + SSB_SROM8_5GL_PA_1, ~0, 0);
271 SPEX(core_pwr_info[i].pa_5gl[2], o + SSB_SROM8_5GL_PA_2, ~0, 0);
272 SPEX(core_pwr_info[i].pa_5g[0], o + SSB_SROM8_5G_PA_0, ~0, 0);
273 SPEX(core_pwr_info[i].pa_5g[1], o + SSB_SROM8_5G_PA_1, ~0, 0);
274 SPEX(core_pwr_info[i].pa_5g[2], o + SSB_SROM8_5G_PA_2, ~0, 0);
275 SPEX(core_pwr_info[i].pa_5gh[0], o + SSB_SROM8_5GH_PA_0, ~0, 0);
276 SPEX(core_pwr_info[i].pa_5gh[1], o + SSB_SROM8_5GH_PA_1, ~0, 0);
277 SPEX(core_pwr_info[i].pa_5gh[2], o + SSB_SROM8_5GH_PA_2, ~0, 0);
280 SPEX(fem.ghz2.tssipos, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TSSIPOS,
281 SSB_SROM8_FEM_TSSIPOS_SHIFT);
282 SPEX(fem.ghz2.extpa_gain, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_EXTPA_GAIN,
283 SSB_SROM8_FEM_EXTPA_GAIN_SHIFT);
284 SPEX(fem.ghz2.pdet_range, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_PDET_RANGE,
285 SSB_SROM8_FEM_PDET_RANGE_SHIFT);
286 SPEX(fem.ghz2.tr_iso, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_TR_ISO,
287 SSB_SROM8_FEM_TR_ISO_SHIFT);
288 SPEX(fem.ghz2.antswlut, SSB_SPROM8_FEM2G, SSB_SROM8_FEM_ANTSWLUT,
289 SSB_SROM8_FEM_ANTSWLUT_SHIFT);
291 SPEX(fem.ghz5.tssipos, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TSSIPOS,
292 SSB_SROM8_FEM_TSSIPOS_SHIFT);
293 SPEX(fem.ghz5.extpa_gain, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_EXTPA_GAIN,
294 SSB_SROM8_FEM_EXTPA_GAIN_SHIFT);
295 SPEX(fem.ghz5.pdet_range, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_PDET_RANGE,
296 SSB_SROM8_FEM_PDET_RANGE_SHIFT);
297 SPEX(fem.ghz5.tr_iso, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_TR_ISO,
298 SSB_SROM8_FEM_TR_ISO_SHIFT);
299 SPEX(fem.ghz5.antswlut, SSB_SPROM8_FEM5G, SSB_SROM8_FEM_ANTSWLUT,
300 SSB_SROM8_FEM_ANTSWLUT_SHIFT);
304 * Indicates the presence of external SPROM.
306 static bool bcma_sprom_ext_available(struct bcma_bus *bus)
312 if (bus->drv_cc.core->id.rev >= 31) {
313 if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM))
316 srom_control = bcma_read32(bus->drv_cc.core,
317 BCMA_CC_SROM_CONTROL);
318 return srom_control & BCMA_CC_SROM_CONTROL_PRESENT;
321 /* older chipcommon revisions use chip status register */
322 chip_status = bcma_read32(bus->drv_cc.core, BCMA_CC_CHIPSTAT);
323 switch (bus->chipinfo.id) {
325 present_mask = BCMA_CC_CHIPST_4313_SPROM_PRESENT;
329 present_mask = BCMA_CC_CHIPST_4331_SPROM_PRESENT;
336 return chip_status & present_mask;
340 * Indicates that on-chip OTP memory is present and enabled.
342 static bool bcma_sprom_onchip_available(struct bcma_bus *bus)
348 chip_status = bcma_read32(bus->drv_cc.core, BCMA_CC_CHIPSTAT);
349 switch (bus->chipinfo.id) {
351 present = chip_status & BCMA_CC_CHIPST_4313_OTP_PRESENT;
355 present = chip_status & BCMA_CC_CHIPST_4331_OTP_PRESENT;
360 /* for these chips OTP is always available */
370 otpsize = bus->drv_cc.capabilities & BCMA_CC_CAP_OTPS;
371 otpsize >>= BCMA_CC_CAP_OTPS_SHIFT;
378 * Verify OTP is filled and determine the byte
379 * offset where SPROM data is located.
381 * On error, returns 0; byte offset otherwise.
383 static int bcma_sprom_onchip_offset(struct bcma_bus *bus)
385 struct bcma_device *cc = bus->drv_cc.core;
388 /* verify OTP status */
389 if ((bcma_read32(cc, BCMA_CC_OTPS) & BCMA_CC_OTPS_GU_PROG_HW) == 0)
392 /* obtain bit offset from otplayout register */
393 offset = (bcma_read32(cc, BCMA_CC_OTPL) & BCMA_CC_OTPL_GURGN_OFFSET);
394 return BCMA_CC_SPROM + (offset >> 3);
397 int bcma_sprom_get(struct bcma_bus *bus)
399 u16 offset = BCMA_CC_SPROM;
403 if (!bus->drv_cc.core)
406 if (!bcma_sprom_ext_available(bus)) {
408 * External SPROM takes precedence so check
409 * on-chip OTP only when no external SPROM
412 if (bcma_sprom_onchip_available(bus)) {
413 /* determine offset */
414 offset = bcma_sprom_onchip_offset(bus);
418 * Maybe there is no SPROM on the device?
419 * Now we ask the arch code if there is some sprom
420 * available for this device in some other storage.
422 err = bcma_fill_sprom_with_fallback(bus, &bus->sprom);
427 sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
432 if (bus->chipinfo.id == 0x4331)
433 bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);
435 pr_debug("SPROM offset 0x%x\n", offset);
436 bcma_sprom_read(bus, offset, sprom);
438 if (bus->chipinfo.id == 0x4331)
439 bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);
441 err = bcma_sprom_valid(sprom);
445 bcma_sprom_extract_r8(bus, sprom);