2 * This file is part of the coreboot project.
4 * Copyright (C) 2010 Advanced Micro Devices, Inc.
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; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <console/console.h>
21 #include <device/device.h>
22 #include <device/pci.h>
23 #include <device/pci_ids.h>
24 #include <device/pci_ops.h>
28 /*------------------------------------------------
30 ------------------------------------------------*/
31 PCIE_CFG AtiPcieCfg = {
32 PCIE_ENABLE_STATIC_DEV_REMAP, /* Config */
33 0, /* ResetReleaseDelay */
38 0, /* PortDetect, filled by GppSbInit */
51 static void PciePowerOffGppPorts(device_t nb_dev, device_t dev, u32 port);
52 static void ValidatePortEn(device_t nb_dev);
54 static void ValidatePortEn(device_t nb_dev)
58 /*****************************************************************
59 * Compliant with CIM_33's PCIEPowerOffGppPorts
60 * Power off unused GPP lines
61 *****************************************************************/
62 static void PciePowerOffGppPorts(device_t nb_dev, device_t dev, u32 port)
66 struct southbridge_amd_rs780_config *cfg =
67 (struct southbridge_amd_rs780_config *)nb_dev->chip_info;
68 u8 state = cfg->port_enable;
70 if (!(AtiPcieCfg.Config & PCIE_DISABLE_HIDE_UNUSED_PORTS))
71 state &= AtiPcieCfg.PortDetect;
73 state &= (1 << 4) + (1 << 5) + (1 << 6) + (1 << 7);
74 state_save = state << 17;
75 state &= !(AtiPcieCfg.PortHp);
76 reg = nbmisc_read_index(nb_dev, 0x0c);
78 nbmisc_write_index(nb_dev, 0x0c, reg);
80 reg = nbmisc_read_index(nb_dev, 0x08);
82 nbmisc_write_index(nb_dev, 0x08, reg);
84 if ((AtiPcieCfg.Config & PCIE_OFF_UNUSED_GPP_LANES)
86 Config & (PCIE_DISABLE_HIDE_UNUSED_PORTS +
87 PCIE_GFX_COMPLIANCE))) {
89 /* step 3 Power Down Control for Southbridge */
90 reg = nbpcie_p_read_index(dev, 0xa2);
92 switch ((reg >> 4) & 0x7) { /* get bit 4-6, LC_LINK_WIDTH_RD */
94 nbpcie_ind_write_index(nb_dev, 0x65, 0x0e0e);
97 nbpcie_ind_write_index(nb_dev, 0x65, 0x0c0c);
104 /**********************************************************************
105 **********************************************************************/
106 static void switching_gppsb_configurations(device_t nb_dev, device_t sb_dev)
109 struct southbridge_amd_rs780_config *cfg =
110 (struct southbridge_amd_rs780_config *)nb_dev->chip_info;
112 /* 5.5.7.1-3 enables GPP reconfiguration */
113 reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7);
115 (RECONFIG_GPPSB_EN + RECONFIG_GPPSB_LINK_CONFIG +
116 RECONFIG_GPPSB_ATOMIC_RESET);
117 nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg);
119 /* 5.5.7.4a. De-asserts STRAP_BIF_all_valid for PCIE-GPPSB core */
120 reg = nbmisc_read_index(nb_dev, 0x66);
122 nbmisc_write_index(nb_dev, 0x66, reg);
123 /* 5.5.7.4b. sets desired GPPSB configurations, bit4-7 */
124 reg = nbmisc_read_index(nb_dev, 0x67);
125 reg &= 0xFFFFff0f; /* clean */
126 reg |= cfg->gppsb_configuration << 4;
127 nbmisc_write_index(nb_dev, 0x67, reg);
131 * In CIMx 4.5.0 and RPR, 4c is done before 5 & 6. But in this way,
132 * a x4 device in port B (dev 4) of Configuration B can only be detected
133 * as x1, instead of x4. When the port B is being trained, the
134 * LC_CURRENT_STATE is 6 and the LC_LINK_WIDTH_RD is 1. We have
135 * to set the PCIEIND:0x65 as 0xE0E0 and reset the slot. Then the card
136 * seems to work in x1 mode.
137 * In the 2nd way below, we do the 5 & 6 before 4c. it conforms the
138 * CIMx 4.3.0. It conflicts with RPR. But based on the test result I've
139 * made so far, I haven't found any mistake.
141 /* 5.5.7.4c. Asserts STRAP_BIF_all_valid for PCIE-GPPSB core */
142 reg = nbmisc_read_index(nb_dev, 0x66);
144 nbmisc_write_index(nb_dev, 0x66, reg);
146 /* 5.5.7.5-6. read bit14 and write back its inverst value */
147 reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7);
148 reg ^= RECONFIG_GPPSB_GPPSB;
149 nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg);
151 /* 5.5.7.5-6. read bit14 and write back its inverst value */
152 reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7);
153 reg ^= RECONFIG_GPPSB_GPPSB;
154 nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg);
156 /* 5.5.7.4c. Asserts STRAP_BIF_all_valid for PCIE-GPPSB core */
157 reg = nbmisc_read_index(nb_dev, 0x66);
159 nbmisc_write_index(nb_dev, 0x66, reg);
161 /* 5.5.7.7. delay 1ms */
164 /* 5.5.7.8. waits until SB has trained to L0, poll for bit0-5 = 0x10 */
166 reg = nbpcie_p_read_index(sb_dev, PCIE_LC_STATE0);
167 reg &= 0x3f; /* remain LSB [5:0] bits */
168 } while (LC_STATE_RECONFIG_GPPSB != reg);
170 /* 5.5.7.9.ensures that virtual channel negotiation is completed. poll for bit1 = 0 */
173 pci_ext_read_config32(nb_dev, sb_dev,
174 PCIE_VC0_RESOURCE_STATUS);
175 } while (reg & VC_NEGOTIATION_PENDING);
178 static void switching_gpp_configurations(device_t nb_dev, device_t sb_dev)
181 struct southbridge_amd_rs780_config *cfg =
182 (struct southbridge_amd_rs780_config *)nb_dev->chip_info;
184 /* 5.6.2.1. De-asserts STRAP_BIF_all_valid for PCIE-GPP core */
185 reg = nbmisc_read_index(nb_dev, 0x22);
187 nbmisc_write_index(nb_dev, 0x22, reg);
188 /* 5.6.2.2. sets desired GPPSB configurations, bit4-7 */
189 reg = nbmisc_read_index(nb_dev, 0x2D);
190 reg &= ~(0xF << 7); /* clean */
191 reg |= cfg->gpp_configuration << 7;
192 nbmisc_write_index(nb_dev, 0x2D, reg);
193 /* 5.6.2.3. Asserts STRAP_BIF_all_valid for PCIE-GPP core */
194 reg = nbmisc_read_index(nb_dev, 0x22);
196 nbmisc_write_index(nb_dev, 0x22, reg);
199 /*****************************************************************
200 * The rs780 uses NBCONFIG:0x1c (BAR3) to map the PCIE Extended Configuration
201 * Space to a 256MB range within the first 4GB of addressable memory.
202 *****************************************************************/
203 void enable_pcie_bar3(device_t nb_dev)
205 printk(BIOS_DEBUG, "enable_pcie_bar3()\n");
206 set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 1 << 30); /* Enables writes to the BAR3 register. */
207 set_nbcfg_enable_bits(nb_dev, 0x84, 7 << 16, 0 << 16);
209 pci_write_config32(nb_dev, 0x1C, EXT_CONF_BASE_ADDRESS); /* PCIEMiscInit */
210 pci_write_config32(nb_dev, 0x20, 0x00000000);
211 set_htiu_enable_bits(nb_dev, 0x32, 1 << 28, 1 << 28); /* PCIEMiscInit */
212 ProgK8TempMmioBase(1, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS);
215 /*****************************************************************
216 * We should disable bar3 when we want to exit rs780_enable, because bar3 will be
217 * remapped in set_resource later.
218 *****************************************************************/
219 void disable_pcie_bar3(device_t nb_dev)
221 printk(BIOS_DEBUG, "disable_pcie_bar3()\n");
222 pci_write_config32(nb_dev, 0x1C, 0); /* clear BAR3 address */
223 set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 0 << 30); /* Disable writes to the BAR3. */
224 set_htiu_enable_bits(nb_dev, 0x32, 1 << 28, 0); /* disable bar3 decode */
225 ProgK8TempMmioBase(0, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS);
228 /*****************************************
229 * Compliant with CIM_33's PCIEGPPInit
235 * p2p bridge number, 4-10
236 *****************************************/
237 void rs780_gpp_sb_init(device_t nb_dev, device_t dev, u32 port)
240 struct southbridge_amd_rs780_config *cfg =
241 (struct southbridge_amd_rs780_config *)nb_dev->chip_info;
242 printk(BIOS_DEBUG, "gpp_sb_init nb_dev=0x%x, dev=0x%x, port=0x%x\n", nb_dev->path.pci.devfn, dev->path.pci.devfn, port);
244 gfx_gpp_sb_sel = port >= 4 && port <= 8 ?
245 PCIE_CORE_INDEX_GPPSB : /* 4,5,6,7,8 */
246 PCIE_CORE_INDEX_GPP; /* 9,10 */
248 /* 5.10.8.3. Disable slave ordering logic */
249 set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 8,
251 /* 5.10.8.7. PCIE initialization 5.10.2: rpr 2.12*/
252 set_pcie_enable_bits(nb_dev, 0x02 | gfx_gpp_sb_sel, 1 << 0, 1 << 0); /* no description in datasheet. */
254 /* init GPPSB port. rpr 5.10.8 */
255 /* 5.10.8.1-5.10.8.2. Sets RCB timeout to be 100ms/4=25ms by setting bits[18:16] to 3 h4
256 * and shortens the enumeration timer by setting bit[19] to 1
258 set_pcie_enable_bits(dev, 0x70, 0xF << 16, 0x4 << 16 | 1 << 19);
259 /* 5.10.8.4. Sets DMA payload size to 64 bytes. */
260 set_pcie_enable_bits(nb_dev, 0x10 | gfx_gpp_sb_sel, 7 << 10, 4 << 10);
261 /* 5.10.8.6. Disable RC ordering logic */
262 set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 9, 1 << 9);
263 /* 5.10.8.7. Ignores DLLs druing L1 */
264 set_pcie_enable_bits(nb_dev, 0x02 | gfx_gpp_sb_sel, 1 << 0, 1 << 0);
265 /* 5.10.8.8. Prevents LCto go from L0 to Rcv_L0s if L1 is armed. */
266 set_pcie_enable_bits(dev, 0xA1, 1 << 11, 1 << 11);
267 /* 5.10.8.9. Sets timer in Config state from 20us to 1us.
268 * 5.10.8.10. De-asserts RX_EN in L0s
269 * 5.10.8.11. Enables de-assertion of PG2RX_CR_EN to lock clock recovery parameter when .. */
270 set_pcie_enable_bits(dev, 0xB1, 1 << 23 | 1 << 19 | 1 << 28, 1 <<23 | 1 << 19 | 1 << 28);
271 /* 5.10.8.12. Turns off offset calibration */
272 /* 5.10.8.13. Enables Rx Clock gating in CDR */
273 if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB)
274 set_nbmisc_enable_bits(nb_dev, 0x67, 1 << 14 | 1 << 26, 1 << 14 | 1 << 26); /* 4,5,6,7 */
276 set_nbmisc_enable_bits(nb_dev, 0x24, 1 << 29 | 1 << 28, 1 << 29 | 1 << 28); /* 9,10 */
277 /* 5.10.8.14. Sets number of TX Clocks to drain TX Pipe to 3 */
278 set_pcie_enable_bits(dev, 0xA0, 0xF << 4, 0x3 << 4);
279 /* 5.10.8.15. empty */
280 /* 5.10.8.16. P_ELEC_IDLE_MODE */
281 set_pcie_enable_bits(nb_dev, 0x40 | gfx_gpp_sb_sel, 0x3 << 14, 0x2 << 14);
282 /* 5.10.8.17. LC_BLOCK_EL_IDLE_IN_L0 */
283 set_pcie_enable_bits(dev, 0xB1, 1 << 20, 1 << 20);
284 /* 5.10.8.18. LC_DONT_GO_TO_L0S_IFL1_ARMED */
285 set_pcie_enable_bits(dev, 0xA1, 1 << 11, 1 << 11);
286 /* 5.10.8.19. RXP_REALIGN_ON_EACH_TSX_OR_SKP */
287 set_pcie_enable_bits(nb_dev, 0x40 | gfx_gpp_sb_sel, 1 << 28, 0 << 28);
288 /* 5.10.8.20. Bypass lane de-skew logic if in x1 */
289 set_pcie_enable_bits(nb_dev, 0xC2 | gfx_gpp_sb_sel, 1 << 14, 1 << 14);
290 /* 5.10.8.21. sets electrical idle threshold. */
291 if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB)
292 set_nbmisc_enable_bits(nb_dev, 0x6A, 3 << 22, 2 << 22);
294 set_nbmisc_enable_bits(nb_dev, 0x24, 3 << 16, 2 << 16);
296 /* 5.10.8.22. Disable GEN2 */
297 /* TODO: should be 2 seperated cases. */
298 set_nbmisc_enable_bits(nb_dev, 0x39, 1 << 31, 0 << 31);
299 set_nbmisc_enable_bits(nb_dev, 0x22, 1 << 5, 0 << 5);
300 set_nbmisc_enable_bits(nb_dev, 0x34, 1 << 31, 0 << 31);
301 set_nbmisc_enable_bits(nb_dev, 0x37, 7 << 5, 0 << 5);
302 /* 5.10.8.23. Disables GEN2 capability of the device. RPR says enable? No! */
303 set_pcie_enable_bits(dev, 0xA4, 1 << 0, 0 << 0);
304 /* 5.10.8.24. Disable advertising upconfigure support. */
305 set_pcie_enable_bits(dev, 0xA2, 1 << 13, 1 << 13);
306 /* 5.10.8.25-26. STRAP_BIF_DSN_EN */
307 if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB)
308 set_nbmisc_enable_bits(nb_dev, 0x68, 1 << 19, 0 << 19);
310 set_nbmisc_enable_bits(nb_dev, 0x22, 1 << 3, 0 << 3);
312 set_pcie_enable_bits(nb_dev, 0xC1 | gfx_gpp_sb_sel, 1 << 0 | 1 << 2, 1 << 0 | 0 << 2);
313 /* 5.10.8.29. Uses the bif_core de-emphasis strength by default. */
314 if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB) {
315 set_nbmisc_enable_bits(nb_dev, 0x67, 1 << 10, 1 << 10);
316 set_nbmisc_enable_bits(nb_dev, 0x36, 1 << 29, 1 << 29);
319 set_nbmisc_enable_bits(nb_dev, 0x39, 1 << 30, 1 << 30);
321 /* 5.10.8.30. Set TX arbitration algorithm to round robin. */
322 set_pcie_enable_bits(nb_dev, 0x1C | gfx_gpp_sb_sel,
323 1 << 0 | 0x1F << 1 | 0x1F << 6,
324 1 << 0 | 0x04 << 1 | 0x04 << 6);
326 /* check compliance rpr step 2.1*/
327 if (AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE) {
329 tmp = nbmisc_read_index(nb_dev, 0x67);
331 nbmisc_write_index(nb_dev, 0x67, tmp);
334 /* step 5: dynamic slave CPL buffer allocation. Disable it, otherwise linux hangs. Why? */
335 /* set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 11, 1 << 11); */
337 /* step 5a: Training for GPP devices */
346 /* 5.10.8.5. Blocks DMA traffic during C3 state */
347 set_pcie_enable_bits(dev, 0x10, 1 << 0, 0 << 0);
348 /* Enabels TLP flushing */
349 set_pcie_enable_bits(dev, 0x20, 1 << 19, 0 << 19);
351 /* check port enable */
352 if (cfg->port_enable & (1 << port)) {
353 PcieReleasePortTraining(nb_dev, dev, port);
354 if (!(AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE)) {
355 u8 res = PcieTrainPort(nb_dev, dev, port);
356 printk(BIOS_DEBUG, "PcieTrainPort port=0x%x result=%d\n", port, res);
358 AtiPcieCfg.PortDetect |= 1 << port;
366 PciePowerOffGppPorts(nb_dev, dev, port);
369 /*****************************************
370 * Compliant with CIM_33's PCIEConfigureGPPCore
371 *****************************************/
372 void config_gpp_core(device_t nb_dev, device_t sb_dev)
375 struct southbridge_amd_rs780_config *cfg =
376 (struct southbridge_amd_rs780_config *)nb_dev->chip_info;
378 reg = nbmisc_read_index(nb_dev, 0x20);
379 if (AtiPcieCfg.Config & PCIE_ENABLE_STATIC_DEV_REMAP)
380 reg &= 0xfffffffd; /* set bit1 = 0 */
382 reg |= 0x2; /* set bit1 = 1 */
383 nbmisc_write_index(nb_dev, 0x20, reg);
385 reg = nbmisc_read_index(nb_dev, 0x67); /* get STRAP_BIF_LINK_CONFIG_GPPSB at bit 4-7 */
386 if (cfg->gppsb_configuration != ((reg >> 4) & 0xf))
387 switching_gppsb_configurations(nb_dev, sb_dev);
388 reg = nbmisc_read_index(nb_dev, 0x2D); /* get STRAP_BIF_LINK_CONFIG_GPP at bit 7-10 */
389 if (cfg->gpp_configuration != ((reg >> 7) & 0xf))
390 switching_gpp_configurations(nb_dev, sb_dev);
391 ValidatePortEn(nb_dev);
395 * Hide unused Gpp port
397 void pcie_hide_unused_ports(device_t nb_dev)
399 u16 hide = 0x6FC; /* skip port 0, 1, 8 */
401 hide &= ~(AtiPcieCfg.PortDetect | AtiPcieCfg.PortHp);
402 printk(BIOS_INFO, "rs780 unused GPP ports bitmap=0x%03x, force disabled\n", hide);
403 set_nbmisc_enable_bits(nb_dev, 0x0C, 0xFC, (hide & 0xFC)); /* bridge 2-7 */
404 set_nbmisc_enable_bits(nb_dev, 0x0C, 0x30000, ((hide >> 9) & 0x3) << 16); /* bridge 9-a */