Commit f473832f authored by Rafał Miłecki's avatar Rafał Miłecki Committed by John W. Linville

bcma: add driver for PCIe Gen 2 core

New Broadcom PCIe devices (802.11ac ones?) use Gen2 and have to be
initialized differently.
Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent fe5e499f
......@@ -3,6 +3,7 @@ bcma-y += driver_chipcommon.o driver_chipcommon_pmu.o
bcma-$(CONFIG_BCMA_SFLASH) += driver_chipcommon_sflash.o
bcma-$(CONFIG_BCMA_NFLASH) += driver_chipcommon_nflash.o
bcma-y += driver_pci.o
bcma-y += driver_pcie2.o
bcma-$(CONFIG_BCMA_DRIVER_PCI_HOSTMODE) += driver_pci_host.o
bcma-$(CONFIG_BCMA_DRIVER_MIPS) += driver_mips.o
bcma-$(CONFIG_BCMA_DRIVER_GMAC_CMN) += driver_gmac_cmn.o
......
/*
* Broadcom specific AMBA
* PCIe Gen 2 Core
*
* Copyright 2014, Broadcom Corporation
* Copyright 2014, Rafał Miłecki <zajec5@gmail.com>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "bcma_private.h"
#include <linux/bcma/bcma.h>
/**************************************************
* R/W ops.
**************************************************/
#if 0
static u32 bcma_core_pcie2_cfg_read(struct bcma_drv_pcie2 *pcie2, u32 addr)
{
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, addr);
pcie2_read32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR);
return pcie2_read32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA);
}
#endif
static void bcma_core_pcie2_cfg_write(struct bcma_drv_pcie2 *pcie2, u32 addr,
u32 val)
{
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, addr);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, val);
}
/**************************************************
* Init.
**************************************************/
static u32 bcma_core_pcie2_war_delay_perst_enab(struct bcma_drv_pcie2 *pcie2,
bool enable)
{
u32 val;
/* restore back to default */
val = pcie2_read32(pcie2, BCMA_CORE_PCIE2_CLK_CONTROL);
val |= PCIE2_CLKC_DLYPERST;
val &= ~PCIE2_CLKC_DISSPROMLD;
if (enable) {
val &= ~PCIE2_CLKC_DLYPERST;
val |= PCIE2_CLKC_DISSPROMLD;
}
pcie2_write32(pcie2, (BCMA_CORE_PCIE2_CLK_CONTROL), val);
/* flush */
return pcie2_read32(pcie2, BCMA_CORE_PCIE2_CLK_CONTROL);
}
static void bcma_core_pcie2_set_ltr_vals(struct bcma_drv_pcie2 *pcie2)
{
/* LTR0 */
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, 0x844);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, 0x883c883c);
/* LTR1 */
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, 0x848);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, 0x88648864);
/* LTR2 */
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, 0x84C);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, 0x90039003);
}
static void bcma_core_pcie2_hw_ltr_war(struct bcma_drv_pcie2 *pcie2)
{
u8 core_rev = pcie2->core->id.rev;
u32 devstsctr2;
if (core_rev < 2 || core_rev == 10 || core_rev > 13)
return;
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR,
PCIE2_CAP_DEVSTSCTRL2_OFFSET);
devstsctr2 = pcie2_read32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA);
if (devstsctr2 & PCIE2_CAP_DEVSTSCTRL2_LTRENAB) {
/* force the right LTR values */
bcma_core_pcie2_set_ltr_vals(pcie2);
/* TODO:
si_core_wrapperreg(pcie2, 3, 0x60, 0x8080, 0); */
/* enable the LTR */
devstsctr2 |= PCIE2_CAP_DEVSTSCTRL2_LTRENAB;
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR,
PCIE2_CAP_DEVSTSCTRL2_OFFSET);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, devstsctr2);
/* set the LTR state to be active */
pcie2_write32(pcie2, BCMA_CORE_PCIE2_LTR_STATE,
PCIE2_LTR_ACTIVE);
usleep_range(1000, 2000);
/* set the LTR state to be sleep */
pcie2_write32(pcie2, BCMA_CORE_PCIE2_LTR_STATE,
PCIE2_LTR_SLEEP);
usleep_range(1000, 2000);
}
}
static void pciedev_crwlpciegen2(struct bcma_drv_pcie2 *pcie2)
{
u8 core_rev = pcie2->core->id.rev;
bool pciewar160, pciewar162;
pciewar160 = core_rev == 7 || core_rev == 9 || core_rev == 11;
pciewar162 = core_rev == 5 || core_rev == 7 || core_rev == 8 ||
core_rev == 9 || core_rev == 11;
if (!pciewar160 && !pciewar162)
return;
/* TODO */
#if 0
pcie2_set32(pcie2, BCMA_CORE_PCIE2_CLK_CONTROL,
PCIE_DISABLE_L1CLK_GATING);
#if 0
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR,
PCIEGEN2_COE_PVT_TL_CTRL_0);
pcie2_mask32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA,
~(1 << COE_PVT_TL_CTRL_0_PM_DIS_L1_REENTRY_BIT));
#endif
#endif
}
static void pciedev_crwlpciegen2_180(struct bcma_drv_pcie2 *pcie2)
{
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, PCIE2_PMCR_REFUP);
pcie2_set32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, 0x1f);
}
static void pciedev_crwlpciegen2_182(struct bcma_drv_pcie2 *pcie2)
{
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR, PCIE2_SBMBX);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, 1 << 0);
}
static void pciedev_reg_pm_clk_period(struct bcma_drv_pcie2 *pcie2)
{
struct bcma_drv_cc *drv_cc = &pcie2->core->bus->drv_cc;
u8 core_rev = pcie2->core->id.rev;
u32 alp_khz, pm_value;
if (core_rev <= 13) {
alp_khz = bcma_pmu_get_alp_clock(drv_cc) / 1000;
pm_value = (1000000 * 2) / alp_khz;
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDADDR,
PCIE2_PVT_REG_PM_CLK_PERIOD);
pcie2_write32(pcie2, BCMA_CORE_PCIE2_CONFIGINDDATA, pm_value);
}
}
void bcma_core_pcie2_init(struct bcma_drv_pcie2 *pcie2)
{
struct bcma_chipinfo *ci = &pcie2->core->bus->chipinfo;
u32 tmp;
tmp = pcie2_read32(pcie2, BCMA_CORE_PCIE2_SPROM(54));
if ((tmp & 0xe) >> 1 == 2)
bcma_core_pcie2_cfg_write(pcie2, 0x4e0, 0x17);
/* TODO: Do we need pcie_reqsize? */
if (ci->id == BCMA_CHIP_ID_BCM4360 && ci->rev > 3)
bcma_core_pcie2_war_delay_perst_enab(pcie2, true);
bcma_core_pcie2_hw_ltr_war(pcie2);
pciedev_crwlpciegen2(pcie2);
pciedev_reg_pm_clk_period(pcie2);
pciedev_crwlpciegen2_180(pcie2);
pciedev_crwlpciegen2_182(pcie2);
}
......@@ -132,6 +132,7 @@ static int bcma_register_cores(struct bcma_bus *bus)
case BCMA_CORE_CHIPCOMMON:
case BCMA_CORE_PCI:
case BCMA_CORE_PCIE:
case BCMA_CORE_PCIE2:
case BCMA_CORE_MIPS_74K:
case BCMA_CORE_4706_MAC_GBIT_COMMON:
continue;
......@@ -281,6 +282,13 @@ int bcma_bus_register(struct bcma_bus *bus)
bcma_core_pci_init(&bus->drv_pci[1]);
}
/* Init PCIe Gen 2 core */
core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
if (core) {
bus->drv_pcie2.core = core;
bcma_core_pcie2_init(&bus->drv_pcie2);
}
/* Init GBIT MAC COMMON core */
core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
if (core) {
......
......@@ -6,6 +6,7 @@
#include <linux/bcma/bcma_driver_chipcommon.h>
#include <linux/bcma/bcma_driver_pci.h>
#include <linux/bcma/bcma_driver_pcie2.h>
#include <linux/bcma/bcma_driver_mips.h>
#include <linux/bcma/bcma_driver_gmac_cmn.h>
#include <linux/ssb/ssb.h> /* SPROM sharing */
......@@ -333,6 +334,7 @@ struct bcma_bus {
struct bcma_drv_cc drv_cc;
struct bcma_drv_pci drv_pci[2];
struct bcma_drv_pcie2 drv_pcie2;
struct bcma_drv_mips drv_mips;
struct bcma_drv_gmac_cmn drv_gmac_cmn;
......
#ifndef LINUX_BCMA_DRIVER_PCIE2_H_
#define LINUX_BCMA_DRIVER_PCIE2_H_
#define BCMA_CORE_PCIE2_CLK_CONTROL 0x0000
#define PCIE2_CLKC_RST_OE 0x0001 /* When set, drives PCI_RESET out to pin */
#define PCIE2_CLKC_RST 0x0002 /* Value driven out to pin */
#define PCIE2_CLKC_SPERST 0x0004 /* SurvivePeRst */
#define PCIE2_CLKC_DISABLE_L1CLK_GATING 0x0010
#define PCIE2_CLKC_DLYPERST 0x0100 /* Delay PeRst to CoE Core */
#define PCIE2_CLKC_DISSPROMLD 0x0200 /* DisableSpromLoadOnPerst */
#define PCIE2_CLKC_WAKE_MODE_L2 0x1000 /* Wake on L2 */
#define BCMA_CORE_PCIE2_RC_PM_CONTROL 0x0004
#define BCMA_CORE_PCIE2_RC_PM_STATUS 0x0008
#define BCMA_CORE_PCIE2_EP_PM_CONTROL 0x000C
#define BCMA_CORE_PCIE2_EP_PM_STATUS 0x0010
#define BCMA_CORE_PCIE2_EP_LTR_CONTROL 0x0014
#define BCMA_CORE_PCIE2_EP_LTR_STATUS 0x0018
#define BCMA_CORE_PCIE2_EP_OBFF_STATUS 0x001C
#define BCMA_CORE_PCIE2_PCIE_ERR_STATUS 0x0020
#define BCMA_CORE_PCIE2_RC_AXI_CONFIG 0x0100
#define BCMA_CORE_PCIE2_EP_AXI_CONFIG 0x0104
#define BCMA_CORE_PCIE2_RXDEBUG_STATUS0 0x0108
#define BCMA_CORE_PCIE2_RXDEBUG_CONTROL0 0x010C
#define BCMA_CORE_PCIE2_CONFIGINDADDR 0x0120
#define BCMA_CORE_PCIE2_CONFIGINDDATA 0x0124
#define BCMA_CORE_PCIE2_MDIOCONTROL 0x0128
#define BCMA_CORE_PCIE2_MDIOWRDATA 0x012C
#define BCMA_CORE_PCIE2_MDIORDDATA 0x0130
#define BCMA_CORE_PCIE2_DATAINTF 0x0180
#define BCMA_CORE_PCIE2_D2H_INTRLAZY_0 0x0188
#define BCMA_CORE_PCIE2_H2D_INTRLAZY_0 0x018c
#define BCMA_CORE_PCIE2_H2D_INTSTAT_0 0x0190
#define BCMA_CORE_PCIE2_H2D_INTMASK_0 0x0194
#define BCMA_CORE_PCIE2_D2H_INTSTAT_0 0x0198
#define BCMA_CORE_PCIE2_D2H_INTMASK_0 0x019c
#define BCMA_CORE_PCIE2_LTR_STATE 0x01A0 /* Latency Tolerance Reporting */
#define PCIE2_LTR_ACTIVE 2
#define PCIE2_LTR_ACTIVE_IDLE 1
#define PCIE2_LTR_SLEEP 0
#define PCIE2_LTR_FINAL_MASK 0x300
#define PCIE2_LTR_FINAL_SHIFT 8
#define BCMA_CORE_PCIE2_PWR_INT_STATUS 0x01A4
#define BCMA_CORE_PCIE2_PWR_INT_MASK 0x01A8
#define BCMA_CORE_PCIE2_CFG_ADDR 0x01F8
#define BCMA_CORE_PCIE2_CFG_DATA 0x01FC
#define BCMA_CORE_PCIE2_SYS_EQ_PAGE 0x0200
#define BCMA_CORE_PCIE2_SYS_MSI_PAGE 0x0204
#define BCMA_CORE_PCIE2_SYS_MSI_INTREN 0x0208
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL0 0x0210
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL1 0x0214
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL2 0x0218
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL3 0x021C
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL4 0x0220
#define BCMA_CORE_PCIE2_SYS_MSI_CTRL5 0x0224
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD0 0x0250
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL0 0x0254
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD1 0x0258
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL1 0x025C
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD2 0x0260
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL2 0x0264
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD3 0x0268
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL3 0x026C
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD4 0x0270
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL4 0x0274
#define BCMA_CORE_PCIE2_SYS_EQ_HEAD5 0x0278
#define BCMA_CORE_PCIE2_SYS_EQ_TAIL5 0x027C
#define BCMA_CORE_PCIE2_SYS_RC_INTX_EN 0x0330
#define BCMA_CORE_PCIE2_SYS_RC_INTX_CSR 0x0334
#define BCMA_CORE_PCIE2_SYS_MSI_REQ 0x0340
#define BCMA_CORE_PCIE2_SYS_HOST_INTR_EN 0x0344
#define BCMA_CORE_PCIE2_SYS_HOST_INTR_CSR 0x0348
#define BCMA_CORE_PCIE2_SYS_HOST_INTR0 0x0350
#define BCMA_CORE_PCIE2_SYS_HOST_INTR1 0x0354
#define BCMA_CORE_PCIE2_SYS_HOST_INTR2 0x0358
#define BCMA_CORE_PCIE2_SYS_HOST_INTR3 0x035C
#define BCMA_CORE_PCIE2_SYS_EP_INT_EN0 0x0360
#define BCMA_CORE_PCIE2_SYS_EP_INT_EN1 0x0364
#define BCMA_CORE_PCIE2_SYS_EP_INT_CSR0 0x0370
#define BCMA_CORE_PCIE2_SYS_EP_INT_CSR1 0x0374
#define BCMA_CORE_PCIE2_SPROM(wordoffset) (0x0800 + ((wordoffset) * 2))
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_0 0x0C00
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_1 0x0C04
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_2 0x0C08
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_3 0x0C0C
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_4 0x0C10
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_5 0x0C14
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_6 0x0C18
#define BCMA_CORE_PCIE2_FUNC0_IMAP0_7 0x0C1C
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_0 0x0C20
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_1 0x0C24
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_2 0x0C28
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_3 0x0C2C
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_4 0x0C30
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_5 0x0C34
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_6 0x0C38
#define BCMA_CORE_PCIE2_FUNC1_IMAP0_7 0x0C3C
#define BCMA_CORE_PCIE2_FUNC0_IMAP1 0x0C80
#define BCMA_CORE_PCIE2_FUNC1_IMAP1 0x0C88
#define BCMA_CORE_PCIE2_FUNC0_IMAP2 0x0CC0
#define BCMA_CORE_PCIE2_FUNC1_IMAP2 0x0CC8
#define BCMA_CORE_PCIE2_IARR0_LOWER 0x0D00
#define BCMA_CORE_PCIE2_IARR0_UPPER 0x0D04
#define BCMA_CORE_PCIE2_IARR1_LOWER 0x0D08
#define BCMA_CORE_PCIE2_IARR1_UPPER 0x0D0C
#define BCMA_CORE_PCIE2_IARR2_LOWER 0x0D10
#define BCMA_CORE_PCIE2_IARR2_UPPER 0x0D14
#define BCMA_CORE_PCIE2_OARR0 0x0D20
#define BCMA_CORE_PCIE2_OARR1 0x0D28
#define BCMA_CORE_PCIE2_OARR2 0x0D30
#define BCMA_CORE_PCIE2_OMAP0_LOWER 0x0D40
#define BCMA_CORE_PCIE2_OMAP0_UPPER 0x0D44
#define BCMA_CORE_PCIE2_OMAP1_LOWER 0x0D48
#define BCMA_CORE_PCIE2_OMAP1_UPPER 0x0D4C
#define BCMA_CORE_PCIE2_OMAP2_LOWER 0x0D50
#define BCMA_CORE_PCIE2_OMAP2_UPPER 0x0D54
#define BCMA_CORE_PCIE2_FUNC1_IARR1_SIZE 0x0D58
#define BCMA_CORE_PCIE2_FUNC1_IARR2_SIZE 0x0D5C
#define BCMA_CORE_PCIE2_MEM_CONTROL 0x0F00
#define BCMA_CORE_PCIE2_MEM_ECC_ERRLOG0 0x0F04
#define BCMA_CORE_PCIE2_MEM_ECC_ERRLOG1 0x0F08
#define BCMA_CORE_PCIE2_LINK_STATUS 0x0F0C
#define BCMA_CORE_PCIE2_STRAP_STATUS 0x0F10
#define BCMA_CORE_PCIE2_RESET_STATUS 0x0F14
#define BCMA_CORE_PCIE2_RESETEN_IN_LINKDOWN 0x0F18
#define BCMA_CORE_PCIE2_MISC_INTR_EN 0x0F1C
#define BCMA_CORE_PCIE2_TX_DEBUG_CFG 0x0F20
#define BCMA_CORE_PCIE2_MISC_CONFIG 0x0F24
#define BCMA_CORE_PCIE2_MISC_STATUS 0x0F28
#define BCMA_CORE_PCIE2_INTR_EN 0x0F30
#define BCMA_CORE_PCIE2_INTR_CLEAR 0x0F34
#define BCMA_CORE_PCIE2_INTR_STATUS 0x0F38
/* PCIE gen2 config regs */
#define PCIE2_INTSTATUS 0x090
#define PCIE2_INTMASK 0x094
#define PCIE2_SBMBX 0x098
#define PCIE2_PMCR_REFUP 0x1814 /* Trefup time */
#define PCIE2_CAP_DEVSTSCTRL2_OFFSET 0xD4
#define PCIE2_CAP_DEVSTSCTRL2_LTRENAB 0x400
#define PCIE2_PVT_REG_PM_CLK_PERIOD 0x184c
struct bcma_drv_pcie2 {
struct bcma_device *core;
};
#define pcie2_read16(pcie2, offset) bcma_read16((pcie2)->core, offset)
#define pcie2_read32(pcie2, offset) bcma_read32((pcie2)->core, offset)
#define pcie2_write16(pcie2, offset, val) bcma_write16((pcie2)->core, offset, val)
#define pcie2_write32(pcie2, offset, val) bcma_write32((pcie2)->core, offset, val)
#define pcie2_set32(pcie2, offset, set) bcma_set32((pcie2)->core, offset, set)
#define pcie2_mask32(pcie2, offset, mask) bcma_mask32((pcie2)->core, offset, mask)
void bcma_core_pcie2_init(struct bcma_drv_pcie2 *pcie2);
#endif /* LINUX_BCMA_DRIVER_PCIE2_H_ */
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