2 * This file is part of the coreboot project.
4 * Copyright (C) 2008 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)
59 /*****************************************************************
60 * Compliant with CIM_33's PCIEPowerOffGppPorts
61 * Power off unused GPP lines
62 *****************************************************************/
63 static void PciePowerOffGppPorts(device_t nb_dev, device_t dev, u32 port)
67 struct southbridge_amd_rs690_config *cfg =
68 (struct southbridge_amd_rs690_config *)nb_dev->chip_info;
69 u8 state = cfg->port_enable;
71 if (!(AtiPcieCfg.Config & PCIE_DISABLE_HIDE_UNUSED_PORTS))
72 state &= AtiPcieCfg.PortDetect;
74 state &= (1 << 4) + (1 << 5) + (1 << 6) + (1 << 7);
75 state_save = state << 17;
76 state &= !(AtiPcieCfg.PortHp);
77 reg = nbmisc_read_index(nb_dev, 0x0c);
79 nbmisc_write_index(nb_dev, 0x0c, reg);
81 reg = nbmisc_read_index(nb_dev, 0x08);
83 nbmisc_write_index(nb_dev, 0x08, reg);
85 if ((AtiPcieCfg.Config & PCIE_OFF_UNUSED_GPP_LANES)
87 Config & (PCIE_DISABLE_HIDE_UNUSED_PORTS +
88 PCIE_GFX_COMPLIANCE))) {
90 /* step 3 Power Down Control for Southbridge */
91 reg = nbpcie_p_read_index(dev, 0xa2);
93 switch ((reg >> 4) & 0x7) { /* get bit 4-6, LC_LINK_WIDTH_RD */
95 nbpcie_ind_write_index(nb_dev, 0x65, 0x0e0e);
98 nbpcie_ind_write_index(nb_dev, 0x65, 0x0c0c);
105 static void pcie_init(struct device *dev)
107 /* Enable pci error detecting */
110 printk_debug("pcie_init in rs690_pcie.c\n");
112 /* System error enable */
113 dword = pci_read_config32(dev, 0x04);
114 dword |= (1 << 8); /* System error enable */
115 dword |= (1 << 30); /* Clear possible errors */
116 pci_write_config32(dev, 0x04, dword);
119 /**********************************************************************
120 **********************************************************************/
121 static void switching_gpp_configurations(device_t nb_dev, device_t sb_dev)
124 struct southbridge_amd_rs690_config *cfg =
125 (struct southbridge_amd_rs690_config *)nb_dev->chip_info;
127 /* enables GPP reconfiguration */
128 reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7);
130 (RECONFIG_GPPSB_EN + RECONFIG_GPPSB_LINK_CONFIG +
131 RECONFIG_GPPSB_ATOMIC_RESET);
132 nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg);
134 /* sets desired GPPSB configurations, bit4-7 */
135 reg = nbmisc_read_index(nb_dev, 0x67);
136 reg &= 0xffffff0f; /* clean */
137 reg |= cfg->gpp_configuration << 4;
138 nbmisc_write_index(nb_dev, 0x67, reg);
140 /* read bit14 and write back its inverst value */
141 reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7);
142 reg ^= RECONFIG_GPPSB_GPPSB;
143 nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg);
148 /* waits until SB has trained to L0, poll for bit0-5 = 0x10 */
150 reg = nbpcie_p_read_index(sb_dev, PCIE_LC_STATE0);
151 reg &= 0x1f; /* remain LSB 5 bits */
152 } while (LC_STATE_RECONFIG_GPPSB != reg);
154 /* ensures that virtual channel negotiation is completed. poll for bit1 = 0 */
157 pci_ext_read_config32(nb_dev, sb_dev,
158 PCIE_VC0_RESOURCE_STATUS);
159 } while (reg & VC_NEGOTIATION_PENDING);
162 /*****************************************************************
163 * The rs690 uses NBCONFIG:0x1c (BAR3) to map the PCIE Extended Configuration
164 * Space to a 256MB range within the first 4GB of addressable memory.
165 *****************************************************************/
166 void enable_pcie_bar3(device_t nb_dev)
168 printk_debug("enable_pcie_bar3()\n");
169 set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 1 << 30); /* Enables writes to the BAR3 register. */
170 set_nbcfg_enable_bits(nb_dev, 0x84, 7 << 16, 0 << 16);
172 pci_write_config32(nb_dev, 0x1C, EXT_CONF_BASE_ADDRESS); /* PCIEMiscInit */
173 pci_write_config32(nb_dev, 0x20, 0x00000000);
174 set_htiu_enable_bits(nb_dev, 0x32, 1 << 28, 1 << 28); /* PCIEMiscInit */
175 ProgK8TempMmioBase(1, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS);
178 /*****************************************************************
179 * We should disable bar3 when we want to exit rs690_enable, because bar3 will be
180 * remapped in set_resource later.
181 *****************************************************************/
182 void disable_pcie_bar3(device_t nb_dev)
184 printk_debug("disable_pcie_bar3()\n");
185 set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 0 << 30); /* Disable writes to the BAR3. */
186 pci_write_config32(nb_dev, 0x1C, 0); /* clear BAR3 address */
187 ProgK8TempMmioBase(0, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS);
190 /*****************************************
191 * Compliant with CIM_33's PCIEGPPInit
197 * p2p bridge number, 4-8
198 *****************************************/
199 void rs690_gpp_sb_init(device_t nb_dev, device_t dev, u32 port)
204 struct southbridge_amd_rs690_config *cfg =
205 (struct southbridge_amd_rs690_config *)nb_dev->chip_info;
206 printk_debug("gpp_sb_init nb_dev=0x%p, dev=0x%p, port=0x%x\n", nb_dev, dev, port);
209 set_pcie_enable_bits(nb_dev, 0x20 | PCIE_CORE_INDEX_GPPSB, 1 << 8,
211 /* PCIE initialization 5.10.2: rpr 2.12*/
212 set_pcie_enable_bits(nb_dev, 0x02 | PCIE_CORE_INDEX_GPPSB, 1 << 0, 1 << 0); /* no description in datasheet. */
214 /* init GPPSB port */
215 /* Sets RCB timeout to be 100ms by setting bits[18:16] to 3 b101 and shortens the enumeration timer by setting bit[19] to 0*/
216 set_pcie_enable_bits(dev, 0x70, 7 << 16, 0xd << 16);
217 /* PCIE initialization 5.10.2: rpr 2.4 */
218 set_pcie_enable_bits(dev, 0x02, ~0xffffffff, 1 << 14);
219 /* Do not gate the electrical idle from the PHY and enables the escape from L1L23 */
220 set_pcie_enable_bits(dev, 0xA0, ~0xffffffbf, (3 << 30) | (3 << 12) | (3 << 4));
221 /* PCIE initialization 5.10.2: rpr 2.13 */
222 set_pcie_enable_bits(dev, 0x02, ~0xffffffff, 1 << 6);
224 /* SLOT_IMPLEMENTED in pcieConfig space */
225 reg8 = pci_read_config8(dev, 0x5b);
227 pci_write_config8(dev, 0x5b, reg8);
229 reg16 = pci_read_config16(dev, 0x5a);
231 pci_write_config16(dev, 0x5a, reg16);
232 nbmisc_write_index(nb_dev, 0x34, 0);
234 /* check compliance rpr step 2.1*/
235 if (AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE) {
237 tmp = nbmisc_read_index(nb_dev, 0x67);
239 nbmisc_write_index(nb_dev, 0x67, tmp);
242 /* step 5: dynamic slave CPL buffer allocation */
243 set_pcie_enable_bits(dev, 0x20, 1 << 11, 1 << 11);
245 /* step 5a: Training for GPP devices */
252 /* Blocks DMA traffic during C3 state */
253 set_pcie_enable_bits(dev, 0x10, 1 << 0, 0 << 0);
254 /* Enabels TLP flushing */
255 set_pcie_enable_bits(dev, 0x20, 1 << 19, 0 << 19);
257 /* check port enable */
258 if (cfg->port_enable & (1 << port)) {
259 PcieReleasePortTraining(nb_dev, dev, port);
260 if (!(AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE)) {
261 u8 res = PcieTrainPort(nb_dev, dev, port);
262 printk_debug("PcieTrainPort port=0x%x result=%d\n", port, res);
264 AtiPcieCfg.PortDetect |= 1 << port;
272 PciePowerOffGppPorts(nb_dev, dev, port);
274 /* step 5b: GFX devices in a GPP slot */
277 sb_dev = dev_find_slot(0, PCI_DEVFN(8, 0));
280 pci_ext_write_config32(nb_dev, sb_dev, 0x114, 0x3f << 1, 0 << 1);
281 /* Maps Traffic Class 1-7 to VC1 */
282 pci_ext_write_config32(nb_dev, sb_dev, 0x120, 0x7f << 1, 0x7f << 1);
283 /* Assigns VC ID to 1 */
284 pci_ext_write_config32(nb_dev, sb_dev, 0x120, 7 << 24, 1 << 24);
286 pci_ext_write_config32(nb_dev, sb_dev, 0x120, 1 << 31, 1 << 31);
289 reg16 = pci_ext_read_config32(nb_dev, sb_dev, 0x124);
291 } while (reg16); /*bit[1] = 0 means VC1 flow control initialization is successful */
295 /* step 6b: L0s for the southbridge link */
296 /* To enalbe L0s in the southbridage*/
298 /* step 6c: L0s for the GPP link(s) */
299 /* To eable L0s in the RS690 for the GPP port(s) */
300 set_pcie_enable_bits(nb_dev, 0xf9, 3 << 13, 2 << 13);
301 set_pcie_enable_bits(dev, 0xa0, 0xf << 8, 0x9 << 8);
302 reg16 = pci_read_config16(dev, 0x68);
304 pci_write_config16(dev, 0x68, reg16);
306 /* step 6d: ASPM L1 for the southbridge link */
307 /* To enalbe L1s in the southbridage*/
309 /* step 6e: ASPM L1 for GPP link(s) */;
310 set_pcie_enable_bits(nb_dev, 0xf9, 3 << 13, 2 << 13);
311 set_pcie_enable_bits(dev, 0xa0, 3 << 12, 3 << 12);
312 set_pcie_enable_bits(dev, 0xa0, 0xf << 4, 3 << 4);
313 reg16 = pci_read_config16(dev, 0x68);
316 pci_write_config16(dev, 0x68, reg16);
318 /* step 6f: Turning off PLL during L1/L23 */
319 set_pcie_enable_bits(nb_dev, 0x40, 1 << 3, 1 << 3);
320 set_pcie_enable_bits(nb_dev, 0x40, 1 << 9, 1 << 9);
322 /* step 6g: TXCLK clock gating */
323 set_nbmisc_enable_bits(nb_dev, 0x7, 3 << 4, 3 << 4);
324 set_nbmisc_enable_bits(nb_dev, 0x7, 1 << 22, 1 << 22);
325 set_pcie_enable_bits(nb_dev, 0x11, 0xf << 4, 0xc << 4);
327 /* step 6h: LCLK clock gating, done in rs690_config_misc_clk() */
330 /*****************************************
331 * Compliant with CIM_33's PCIEConfigureGPPCore
332 *****************************************/
333 void config_gpp_core(device_t nb_dev, device_t sb_dev)
336 struct southbridge_amd_rs690_config *cfg =
337 (struct southbridge_amd_rs690_config *)nb_dev->chip_info;
339 reg = nbmisc_read_index(nb_dev, 0x20);
340 if (AtiPcieCfg.Config & PCIE_ENABLE_STATIC_DEV_REMAP)
341 reg &= 0xfffffffd; /* set bit1 = 0 */
343 reg |= 0x2; /* set bit1 = 1 */
344 nbmisc_write_index(nb_dev, 0x20, reg);
346 reg = nbmisc_read_index(nb_dev, 0x67); /* get STRAP_BIF_LINK_CONFIG_GPPSB at bit 4-7 */
347 if (cfg->gpp_configuration != ((reg >> 4) & 0xf))
348 switching_gpp_configurations(nb_dev, sb_dev);
349 ValidatePortEn(nb_dev);
352 /*****************************************
353 * Compliant with CIM_33's PCIEMiscClkProg
354 *****************************************/
355 void pcie_config_misc_clk(device_t nb_dev)
358 struct bus pbus; /* fake bus for dev0 fun1 */
360 reg = pci_read_config32(nb_dev, 0x4c);
362 pci_write_config32(nb_dev, 0x4c, reg);
364 if (AtiPcieCfg.Config & PCIE_GFX_CLK_GATING) {
365 /* TXCLK Clock Gating */
366 set_nbmisc_enable_bits(nb_dev, 0x07, 3 << 0, 3 << 0);
367 set_nbmisc_enable_bits(nb_dev, 0x07, 1 << 22, 1 << 22);
368 set_pcie_enable_bits(nb_dev, 0x11 | PCIE_CORE_INDEX_GFX, (3 << 6) | (~0xf), 3 << 6);
370 /* LCLK Clock Gating */
371 reg = pci_cf8_conf1.read32(&pbus, 0, 1, 0x94);
373 pci_cf8_conf1.write32(&pbus, 0, 1, 0x94, reg);
376 if (AtiPcieCfg.Config & PCIE_GPP_CLK_GATING) {
377 /* TXCLK Clock Gating */
378 set_nbmisc_enable_bits(nb_dev, 0x07, 3 << 4, 3 << 4);
379 set_nbmisc_enable_bits(nb_dev, 0x07, 1 << 22, 1 << 22);
380 set_pcie_enable_bits(nb_dev, 0x11 | PCIE_CORE_INDEX_GPPSB, (3 << 6) | (~0xf), 3 << 6);
382 /* LCLK Clock Gating */
383 reg = pci_cf8_conf1.read32(&pbus, 0, 1, 0x94);
385 pci_cf8_conf1.write32(&pbus, 0, 1, 0x94, reg);
388 reg = pci_read_config32(nb_dev, 0x4c);
390 pci_write_config32(nb_dev, 0x4c, reg);