2 * Broadcom specific AMBA
5 * Copyright 2005, 2011, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
7 * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
9 * Licensed under the GNU/GPL. See COPYING for details.
12 #include "bcma_private.h"
13 #include <linux/export.h>
14 #include <linux/bcma/bcma.h>
16 /**************************************************
18 **************************************************/
20 u32 bcma_pcie_read(struct bcma_drv_pci *pc, u32 address)
22 pcicore_write32(pc, BCMA_CORE_PCI_PCIEIND_ADDR, address);
23 pcicore_read32(pc, BCMA_CORE_PCI_PCIEIND_ADDR);
24 return pcicore_read32(pc, BCMA_CORE_PCI_PCIEIND_DATA);
27 static void bcma_pcie_write(struct bcma_drv_pci *pc, u32 address, u32 data)
29 pcicore_write32(pc, BCMA_CORE_PCI_PCIEIND_ADDR, address);
30 pcicore_read32(pc, BCMA_CORE_PCI_PCIEIND_ADDR);
31 pcicore_write32(pc, BCMA_CORE_PCI_PCIEIND_DATA, data);
34 static void bcma_pcie_mdio_set_phy(struct bcma_drv_pci *pc, u16 phy)
39 v = BCMA_CORE_PCI_MDIODATA_START;
40 v |= BCMA_CORE_PCI_MDIODATA_WRITE;
41 v |= (BCMA_CORE_PCI_MDIODATA_DEV_ADDR <<
42 BCMA_CORE_PCI_MDIODATA_DEVADDR_SHF);
43 v |= (BCMA_CORE_PCI_MDIODATA_BLK_ADDR <<
44 BCMA_CORE_PCI_MDIODATA_REGADDR_SHF);
45 v |= BCMA_CORE_PCI_MDIODATA_TA;
47 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_DATA, v);
50 for (i = 0; i < 200; i++) {
51 v = pcicore_read32(pc, BCMA_CORE_PCI_MDIO_CONTROL);
52 if (v & BCMA_CORE_PCI_MDIOCTL_ACCESS_DONE)
54 usleep_range(1000, 2000);
58 static u16 bcma_pcie_mdio_read(struct bcma_drv_pci *pc, u16 device, u8 address)
65 /* enable mdio access to SERDES */
66 v = BCMA_CORE_PCI_MDIOCTL_PREAM_EN;
67 v |= BCMA_CORE_PCI_MDIOCTL_DIVISOR_VAL;
68 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_CONTROL, v);
70 if (pc->core->id.rev >= 10) {
72 bcma_pcie_mdio_set_phy(pc, device);
73 v = (BCMA_CORE_PCI_MDIODATA_DEV_ADDR <<
74 BCMA_CORE_PCI_MDIODATA_DEVADDR_SHF);
75 v |= (address << BCMA_CORE_PCI_MDIODATA_REGADDR_SHF);
77 v = (device << BCMA_CORE_PCI_MDIODATA_DEVADDR_SHF_OLD);
78 v |= (address << BCMA_CORE_PCI_MDIODATA_REGADDR_SHF_OLD);
81 v = BCMA_CORE_PCI_MDIODATA_START;
82 v |= BCMA_CORE_PCI_MDIODATA_READ;
83 v |= BCMA_CORE_PCI_MDIODATA_TA;
85 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_DATA, v);
86 /* Wait for the device to complete the transaction */
88 for (i = 0; i < max_retries; i++) {
89 v = pcicore_read32(pc, BCMA_CORE_PCI_MDIO_CONTROL);
90 if (v & BCMA_CORE_PCI_MDIOCTL_ACCESS_DONE) {
92 ret = pcicore_read32(pc, BCMA_CORE_PCI_MDIO_DATA);
95 usleep_range(1000, 2000);
97 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_CONTROL, 0);
101 static void bcma_pcie_mdio_write(struct bcma_drv_pci *pc, u16 device,
102 u8 address, u16 data)
104 int max_retries = 10;
108 /* enable mdio access to SERDES */
109 v = BCMA_CORE_PCI_MDIOCTL_PREAM_EN;
110 v |= BCMA_CORE_PCI_MDIOCTL_DIVISOR_VAL;
111 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_CONTROL, v);
113 if (pc->core->id.rev >= 10) {
115 bcma_pcie_mdio_set_phy(pc, device);
116 v = (BCMA_CORE_PCI_MDIODATA_DEV_ADDR <<
117 BCMA_CORE_PCI_MDIODATA_DEVADDR_SHF);
118 v |= (address << BCMA_CORE_PCI_MDIODATA_REGADDR_SHF);
120 v = (device << BCMA_CORE_PCI_MDIODATA_DEVADDR_SHF_OLD);
121 v |= (address << BCMA_CORE_PCI_MDIODATA_REGADDR_SHF_OLD);
124 v = BCMA_CORE_PCI_MDIODATA_START;
125 v |= BCMA_CORE_PCI_MDIODATA_WRITE;
126 v |= BCMA_CORE_PCI_MDIODATA_TA;
128 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_DATA, v);
129 /* Wait for the device to complete the transaction */
131 for (i = 0; i < max_retries; i++) {
132 v = pcicore_read32(pc, BCMA_CORE_PCI_MDIO_CONTROL);
133 if (v & BCMA_CORE_PCI_MDIOCTL_ACCESS_DONE)
135 usleep_range(1000, 2000);
137 pcicore_write32(pc, BCMA_CORE_PCI_MDIO_CONTROL, 0);
140 static u16 bcma_pcie_mdio_writeread(struct bcma_drv_pci *pc, u16 device,
141 u8 address, u16 data)
143 bcma_pcie_mdio_write(pc, device, address, data);
144 return bcma_pcie_mdio_read(pc, device, address);
147 /**************************************************
149 **************************************************/
151 static u8 bcma_pcicore_polarity_workaround(struct bcma_drv_pci *pc)
155 tmp = bcma_pcie_read(pc, BCMA_CORE_PCI_PLP_STATUSREG);
156 if (tmp & BCMA_CORE_PCI_PLP_POLARITYINV_STAT)
157 return BCMA_CORE_PCI_SERDES_RX_CTRL_FORCE |
158 BCMA_CORE_PCI_SERDES_RX_CTRL_POLARITY;
160 return BCMA_CORE_PCI_SERDES_RX_CTRL_FORCE;
163 static void bcma_pcicore_serdes_workaround(struct bcma_drv_pci *pc)
167 bcma_pcie_mdio_write(pc, BCMA_CORE_PCI_MDIODATA_DEV_RX,
168 BCMA_CORE_PCI_SERDES_RX_CTRL,
169 bcma_pcicore_polarity_workaround(pc));
170 tmp = bcma_pcie_mdio_read(pc, BCMA_CORE_PCI_MDIODATA_DEV_PLL,
171 BCMA_CORE_PCI_SERDES_PLL_CTRL);
172 if (tmp & BCMA_CORE_PCI_PLL_CTRL_FREQDET_EN)
173 bcma_pcie_mdio_write(pc, BCMA_CORE_PCI_MDIODATA_DEV_PLL,
174 BCMA_CORE_PCI_SERDES_PLL_CTRL,
175 tmp & ~BCMA_CORE_PCI_PLL_CTRL_FREQDET_EN);
178 static void bcma_core_pci_fixcfg(struct bcma_drv_pci *pc)
180 struct bcma_device *core = pc->core;
181 u16 val16, core_index;
184 regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_PI_OFFSET);
185 core_index = (u16)core->core_index;
187 val16 = pcicore_read16(pc, regoff);
188 if (((val16 & BCMA_CORE_PCI_SPROM_PI_MASK) >> BCMA_CORE_PCI_SPROM_PI_SHIFT)
190 val16 = (core_index << BCMA_CORE_PCI_SPROM_PI_SHIFT) |
191 (val16 & ~BCMA_CORE_PCI_SPROM_PI_MASK);
192 pcicore_write16(pc, regoff, val16);
196 /* Fix MISC config to allow coming out of L2/L3-Ready state w/o PRST */
197 /* Needs to happen when coming out of 'standby'/'hibernate' */
198 static void bcma_core_pci_config_fixup(struct bcma_drv_pci *pc)
203 regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_MISC_CONFIG);
205 val16 = pcicore_read16(pc, regoff);
207 if (!(val16 & BCMA_CORE_PCI_SPROM_L23READY_EXIT_NOPERST)) {
208 val16 |= BCMA_CORE_PCI_SPROM_L23READY_EXIT_NOPERST;
209 pcicore_write16(pc, regoff, val16);
213 static void bcma_core_pci_power_save(struct bcma_drv_pci *pc, bool up)
217 if (pc->core->id.rev >= 15 && pc->core->id.rev <= 20) {
218 data = up ? 0x74 : 0x7C;
219 bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
220 BCMA_CORE_PCI_MDIO_BLK1_MGMT1, 0x7F64);
221 bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
222 BCMA_CORE_PCI_MDIO_BLK1_MGMT3, data);
223 } else if (pc->core->id.rev >= 21 && pc->core->id.rev <= 22) {
224 data = up ? 0x75 : 0x7D;
225 bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
226 BCMA_CORE_PCI_MDIO_BLK1_MGMT1, 0x7E65);
227 bcma_pcie_mdio_writeread(pc, BCMA_CORE_PCI_MDIO_BLK1,
228 BCMA_CORE_PCI_MDIO_BLK1_MGMT3, data);
232 /**************************************************
234 **************************************************/
236 static void bcma_core_pci_clientmode_init(struct bcma_drv_pci *pc)
238 bcma_core_pci_fixcfg(pc);
239 bcma_pcicore_serdes_workaround(pc);
240 bcma_core_pci_config_fixup(pc);
243 void bcma_core_pci_init(struct bcma_drv_pci *pc)
248 #ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
249 pc->hostmode = bcma_core_pci_is_in_hostmode(pc);
251 bcma_core_pci_hostmode_init(pc);
252 #endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
255 bcma_core_pci_clientmode_init(pc);
258 int bcma_core_pci_irq_ctl(struct bcma_drv_pci *pc, struct bcma_device *core,
261 struct pci_dev *pdev;
265 if (!pc || core->bus->hosttype != BCMA_HOSTTYPE_PCI) {
266 /* This bcma device is not on a PCI host-bus. So the IRQs are
267 * not routed through the PCI core.
268 * So we must not enable routing through the PCI core. */
272 pdev = pc->core->bus->host_pci;
274 err = pci_read_config_dword(pdev, BCMA_PCI_IRQMASK, &tmp);
278 coremask = BIT(core->core_index) << 8;
284 err = pci_write_config_dword(pdev, BCMA_PCI_IRQMASK, tmp);
289 EXPORT_SYMBOL_GPL(bcma_core_pci_irq_ctl);
291 static void bcma_core_pci_extend_L1timer(struct bcma_drv_pci *pc, bool extend)
295 w = bcma_pcie_read(pc, BCMA_CORE_PCI_DLLP_PMTHRESHREG);
297 w |= BCMA_CORE_PCI_ASPMTIMER_EXTEND;
299 w &= ~BCMA_CORE_PCI_ASPMTIMER_EXTEND;
300 bcma_pcie_write(pc, BCMA_CORE_PCI_DLLP_PMTHRESHREG, w);
301 bcma_pcie_read(pc, BCMA_CORE_PCI_DLLP_PMTHRESHREG);
304 void bcma_core_pci_up(struct bcma_bus *bus)
306 struct bcma_drv_pci *pc;
308 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
311 pc = &bus->drv_pci[0];
313 bcma_core_pci_power_save(pc, true);
315 bcma_core_pci_extend_L1timer(pc, true);
317 EXPORT_SYMBOL_GPL(bcma_core_pci_up);
319 void bcma_core_pci_down(struct bcma_bus *bus)
321 struct bcma_drv_pci *pc;
323 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
326 pc = &bus->drv_pci[0];
328 bcma_core_pci_extend_L1timer(pc, false);
330 bcma_core_pci_power_save(pc, false);
332 EXPORT_SYMBOL_GPL(bcma_core_pci_down);