ssb: Add PMU support

This adds support for the SSB PMU.
A PMU is found on Low-Power devices.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 224 insertions, 0 deletions

diff --git a/include/linux/ssb/ssb_driver_chipcommon.h b/include/linux/ssb/ssb_driver_chipcommon.h
index 7d7e03dcf77c..d3b1d18922f2 100644
--- a/include/linux/ssb/ssb_driver_chipcommon.h
+++ b/include/linux/ssb/ssb_driver_chipcommon.h
@@ -181,6 +181,16 @@
 #define SSB_CHIPCO_PROG_WAITCNT         0x0124
 #define SSB_CHIPCO_FLASH_CFG            0x0128
 #define SSB_CHIPCO_FLASH_WAITCNT        0x012C
+#define SSB_CHIPCO_CLKCTLST             0x01E0 /* Clock control and status (rev >= 20) */
+#define  SSB_CHIPCO_CLKCTLST_FORCEALP   0x00000001 /* Force ALP request */
+#define  SSB_CHIPCO_CLKCTLST_FORCEHT    0x00000002 /* Force HT request */
+#define  SSB_CHIPCO_CLKCTLST_FORCEILP   0x00000004 /* Force ILP request */
+#define  SSB_CHIPCO_CLKCTLST_HAVEALPREQ 0x00000008 /* ALP available request */
+#define  SSB_CHIPCO_CLKCTLST_HAVEHTREQ  0x00000010 /* HT available request */
+#define  SSB_CHIPCO_CLKCTLST_HWCROFF    0x00000020 /* Force HW clock request off */
+#define  SSB_CHIPCO_CLKCTLST_HAVEHT     0x00010000 /* HT available */
+#define  SSB_CHIPCO_CLKCTLST_HAVEALP    0x00020000 /* APL available */
+#define SSB_CHIPCO_HW_WORKAROUND        0x01E4 /* Hardware workaround (rev >= 20) */
 #define SSB_CHIPCO_UART0_DATA           0x0300
 #define SSB_CHIPCO_UART0_IMR            0x0304
 #define SSB_CHIPCO_UART0_FCR            0x0308
@@ -197,6 +207,196 @@
 #define SSB_CHIPCO_UART1_LSR            0x0414
 #define SSB_CHIPCO_UART1_MSR            0x0418
 #define SSB_CHIPCO_UART1_SCRATCH        0x041C
+/* PMU registers (rev >= 20) */
+#define SSB_CHIPCO_PMU_CTL                      0x0600 /* PMU control */
+#define  SSB_CHIPCO_PMU_CTL_ILP_DIV             0xFFFF0000 /* ILP div mask */
+#define  SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT       16
+#define  SSB_CHIPCO_PMU_CTL_NOILPONW            0x00000200 /* No ILP on wait */
+#define  SSB_CHIPCO_PMU_CTL_HTREQEN             0x00000100 /* HT req enable */
+#define  SSB_CHIPCO_PMU_CTL_ALPREQEN            0x00000080 /* ALP req enable */
+#define  SSB_CHIPCO_PMU_CTL_XTALFREQ            0x0000007C /* Crystal freq */
+#define  SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT      2
+#define  SSB_CHIPCO_PMU_CTL_ILPDIVEN            0x00000002 /* ILP div enable */
+#define  SSB_CHIPCO_PMU_CTL_LPOSEL              0x00000001 /* LPO sel */
+#define SSB_CHIPCO_PMU_CAP                      0x0604 /* PMU capabilities */
+#define  SSB_CHIPCO_PMU_CAP_REVISION            0x000000FF /* Revision mask */
+#define SSB_CHIPCO_PMU_STAT                     0x0608 /* PMU status */
+#define  SSB_CHIPCO_PMU_STAT_INTPEND            0x00000040 /* Interrupt pending */
+#define  SSB_CHIPCO_PMU_STAT_SBCLKST            0x00000030 /* Backplane clock status? */
+#define  SSB_CHIPCO_PMU_STAT_HAVEALP            0x00000008 /* ALP available */
+#define  SSB_CHIPCO_PMU_STAT_HAVEHT             0x00000004 /* HT available */
+#define  SSB_CHIPCO_PMU_STAT_RESINIT            0x00000003 /* Res init */
+#define SSB_CHIPCO_PMU_RES_STAT                 0x060C /* PMU res status */
+#define SSB_CHIPCO_PMU_RES_PEND                 0x0610 /* PMU res pending */
+#define SSB_CHIPCO_PMU_TIMER                    0x0614 /* PMU timer */
+#define SSB_CHIPCO_PMU_MINRES_MSK               0x0618 /* PMU min res mask */
+#define SSB_CHIPCO_PMU_MAXRES_MSK               0x061C /* PMU max res mask */
+#define SSB_CHIPCO_PMU_RES_TABSEL               0x0620 /* PMU res table sel */
+#define SSB_CHIPCO_PMU_RES_DEPMSK               0x0624 /* PMU res dep mask */
+#define SSB_CHIPCO_PMU_RES_UPDNTM               0x0628 /* PMU res updown timer */
+#define SSB_CHIPCO_PMU_RES_TIMER                0x062C /* PMU res timer */
+#define SSB_CHIPCO_PMU_CLKSTRETCH               0x0630 /* PMU clockstretch */
+#define SSB_CHIPCO_PMU_WATCHDOG                 0x0634 /* PMU watchdog */
+#define SSB_CHIPCO_PMU_RES_REQTS                0x0640 /* PMU res req timer sel */
+#define SSB_CHIPCO_PMU_RES_REQT                 0x0644 /* PMU res req timer */
+#define SSB_CHIPCO_PMU_RES_REQM                 0x0648 /* PMU res req mask */
+#define SSB_CHIPCO_CHIPCTL_ADDR                 0x0650
+#define SSB_CHIPCO_CHIPCTL_DATA                 0x0654
+#define SSB_CHIPCO_REGCTL_ADDR                  0x0658
+#define SSB_CHIPCO_REGCTL_DATA                  0x065C
+#define SSB_CHIPCO_PLLCTL_ADDR                  0x0660
+#define SSB_CHIPCO_PLLCTL_DATA                  0x0664
+
+
+
+/** PMU PLL registers */
+
+/* PMU rev 0 PLL registers */
+#define SSB_PMU0_PLLCTL0                        0
+#define  SSB_PMU0_PLLCTL0_PDIV_MSK              0x00000001
+#define  SSB_PMU0_PLLCTL0_PDIV_FREQ             25000 /* kHz */
+#define SSB_PMU0_PLLCTL1                        1
+#define  SSB_PMU0_PLLCTL1_WILD_IMSK             0xF0000000 /* Wild int mask (low nibble) */
+#define  SSB_PMU0_PLLCTL1_WILD_IMSK_SHIFT       28
+#define  SSB_PMU0_PLLCTL1_WILD_FMSK             0x0FFFFF00 /* Wild frac mask */
+#define  SSB_PMU0_PLLCTL1_WILD_FMSK_SHIFT       8
+#define  SSB_PMU0_PLLCTL1_STOPMOD               0x00000040 /* Stop mod */
+#define SSB_PMU0_PLLCTL2                        2
+#define  SSB_PMU0_PLLCTL2_WILD_IMSKHI           0x0000000F /* Wild int mask (high nibble) */
+#define  SSB_PMU0_PLLCTL2_WILD_IMSKHI_SHIFT     0
+
+/* PMU rev 1 PLL registers */
+#define SSB_PMU1_PLLCTL0                        0
+#define  SSB_PMU1_PLLCTL0_P1DIV                 0x00F00000 /* P1 div */
+#define  SSB_PMU1_PLLCTL0_P1DIV_SHIFT           20
+#define  SSB_PMU1_PLLCTL0_P2DIV                 0x0F000000 /* P2 div */
+#define  SSB_PMU1_PLLCTL0_P2DIV_SHIFT           24
+#define SSB_PMU1_PLLCTL1                        1
+#define  SSB_PMU1_PLLCTL1_M1DIV                 0x000000FF /* M1 div */
+#define  SSB_PMU1_PLLCTL1_M1DIV_SHIFT           0
+#define  SSB_PMU1_PLLCTL1_M2DIV                 0x0000FF00 /* M2 div */
+#define  SSB_PMU1_PLLCTL1_M2DIV_SHIFT           8
+#define  SSB_PMU1_PLLCTL1_M3DIV                 0x00FF0000 /* M3 div */
+#define  SSB_PMU1_PLLCTL1_M3DIV_SHIFT           16
+#define  SSB_PMU1_PLLCTL1_M4DIV                 0xFF000000 /* M4 div */
+#define  SSB_PMU1_PLLCTL1_M4DIV_SHIFT           24
+#define SSB_PMU1_PLLCTL2                        2
+#define  SSB_PMU1_PLLCTL2_M5DIV                 0x000000FF /* M5 div */
+#define  SSB_PMU1_PLLCTL2_M5DIV_SHIFT           0
+#define  SSB_PMU1_PLLCTL2_M6DIV                 0x0000FF00 /* M6 div */
+#define  SSB_PMU1_PLLCTL2_M6DIV_SHIFT           8
+#define  SSB_PMU1_PLLCTL2_NDIVMODE              0x000E0000 /* NDIV mode */
+#define  SSB_PMU1_PLLCTL2_NDIVMODE_SHIFT        17
+#define  SSB_PMU1_PLLCTL2_NDIVINT               0x1FF00000 /* NDIV int */
+#define  SSB_PMU1_PLLCTL2_NDIVINT_SHIFT         20
+#define SSB_PMU1_PLLCTL3                        3
+#define  SSB_PMU1_PLLCTL3_NDIVFRAC              0x00FFFFFF /* NDIV frac */
+#define  SSB_PMU1_PLLCTL3_NDIVFRAC_SHIFT        0
+#define SSB_PMU1_PLLCTL4                        4
+#define SSB_PMU1_PLLCTL5                        5
+#define  SSB_PMU1_PLLCTL5_CLKDRV                0xFFFFFF00 /* clk drv */
+#define  SSB_PMU1_PLLCTL5_CLKDRV_SHIFT          8
+
+/* BCM4312 PLL resource numbers. */
+#define SSB_PMURES_4312_SWITCHER_BURST          0
+#define SSB_PMURES_4312_SWITCHER_PWM            1
+#define SSB_PMURES_4312_PA_REF_LDO              2
+#define SSB_PMURES_4312_CORE_LDO_BURST          3
+#define SSB_PMURES_4312_CORE_LDO_PWM            4
+#define SSB_PMURES_4312_RADIO_LDO               5
+#define SSB_PMURES_4312_ILP_REQUEST             6
+#define SSB_PMURES_4312_BG_FILTBYP              7
+#define SSB_PMURES_4312_TX_FILTBYP              8
+#define SSB_PMURES_4312_RX_FILTBYP              9
+#define SSB_PMURES_4312_XTAL_PU                 10
+#define SSB_PMURES_4312_ALP_AVAIL               11
+#define SSB_PMURES_4312_BB_PLL_FILTBYP          12
+#define SSB_PMURES_4312_RF_PLL_FILTBYP          13
+#define SSB_PMURES_4312_HT_AVAIL                14
+
+/* BCM4325 PLL resource numbers. */
+#define SSB_PMURES_4325_BUCK_BOOST_BURST        0
+#define SSB_PMURES_4325_CBUCK_BURST             1
+#define SSB_PMURES_4325_CBUCK_PWM               2
+#define SSB_PMURES_4325_CLDO_CBUCK_BURST        3
+#define SSB_PMURES_4325_CLDO_CBUCK_PWM          4
+#define SSB_PMURES_4325_BUCK_BOOST_PWM          5
+#define SSB_PMURES_4325_ILP_REQUEST             6
+#define SSB_PMURES_4325_ABUCK_BURST             7
+#define SSB_PMURES_4325_ABUCK_PWM               8
+#define SSB_PMURES_4325_LNLDO1_PU               9
+#define SSB_PMURES_4325_LNLDO2_PU               10
+#define SSB_PMURES_4325_LNLDO3_PU               11
+#define SSB_PMURES_4325_LNLDO4_PU               12
+#define SSB_PMURES_4325_XTAL_PU                 13
+#define SSB_PMURES_4325_ALP_AVAIL               14
+#define SSB_PMURES_4325_RX_PWRSW_PU             15
+#define SSB_PMURES_4325_TX_PWRSW_PU             16
+#define SSB_PMURES_4325_RFPLL_PWRSW_PU          17
+#define SSB_PMURES_4325_LOGEN_PWRSW_PU          18
+#define SSB_PMURES_4325_AFE_PWRSW_PU            19
+#define SSB_PMURES_4325_BBPLL_PWRSW_PU          20
+#define SSB_PMURES_4325_HT_AVAIL                21
+
+/* BCM4328 PLL resource numbers. */
+#define SSB_PMURES_4328_EXT_SWITCHER_PWM        0
+#define SSB_PMURES_4328_BB_SWITCHER_PWM         1
+#define SSB_PMURES_4328_BB_SWITCHER_BURST       2
+#define SSB_PMURES_4328_BB_EXT_SWITCHER_BURST   3
+#define SSB_PMURES_4328_ILP_REQUEST             4
+#define SSB_PMURES_4328_RADIO_SWITCHER_PWM      5
+#define SSB_PMURES_4328_RADIO_SWITCHER_BURST    6
+#define SSB_PMURES_4328_ROM_SWITCH              7
+#define SSB_PMURES_4328_PA_REF_LDO              8
+#define SSB_PMURES_4328_RADIO_LDO               9
+#define SSB_PMURES_4328_AFE_LDO                 10
+#define SSB_PMURES_4328_PLL_LDO                 11
+#define SSB_PMURES_4328_BG_FILTBYP              12
+#define SSB_PMURES_4328_TX_FILTBYP              13
+#define SSB_PMURES_4328_RX_FILTBYP              14
+#define SSB_PMURES_4328_XTAL_PU                 15
+#define SSB_PMURES_4328_XTAL_EN                 16
+#define SSB_PMURES_4328_BB_PLL_FILTBYP          17
+#define SSB_PMURES_4328_RF_PLL_FILTBYP          18
+#define SSB_PMURES_4328_BB_PLL_PU               19
+
+/* BCM5354 PLL resource numbers. */
+#define SSB_PMURES_5354_EXT_SWITCHER_PWM        0
+#define SSB_PMURES_5354_BB_SWITCHER_PWM         1
+#define SSB_PMURES_5354_BB_SWITCHER_BURST       2
+#define SSB_PMURES_5354_BB_EXT_SWITCHER_BURST   3
+#define SSB_PMURES_5354_ILP_REQUEST             4
+#define SSB_PMURES_5354_RADIO_SWITCHER_PWM      5
+#define SSB_PMURES_5354_RADIO_SWITCHER_BURST    6
+#define SSB_PMURES_5354_ROM_SWITCH              7
+#define SSB_PMURES_5354_PA_REF_LDO              8
+#define SSB_PMURES_5354_RADIO_LDO               9
+#define SSB_PMURES_5354_AFE_LDO                 10
+#define SSB_PMURES_5354_PLL_LDO                 11
+#define SSB_PMURES_5354_BG_FILTBYP              12
+#define SSB_PMURES_5354_TX_FILTBYP              13
+#define SSB_PMURES_5354_RX_FILTBYP              14
+#define SSB_PMURES_5354_XTAL_PU                 15
+#define SSB_PMURES_5354_XTAL_EN                 16
+#define SSB_PMURES_5354_BB_PLL_FILTBYP          17
+#define SSB_PMURES_5354_RF_PLL_FILTBYP          18
+#define SSB_PMURES_5354_BB_PLL_PU               19
+
+
+
+/** Chip specific Chip-Status register contents. */
+#define SSB_CHIPCO_CHST_4325_SPROM_OTP_SEL      0x00000003
+#define SSB_CHIPCO_CHST_4325_DEFCIS_SEL         0 /* OTP is powered up, use def. CIS, no SPROM */
+#define SSB_CHIPCO_CHST_4325_SPROM_SEL          1 /* OTP is powered up, SPROM is present */
+#define SSB_CHIPCO_CHST_4325_OTP_SEL            2 /* OTP is powered up, no SPROM */
+#define SSB_CHIPCO_CHST_4325_OTP_PWRDN          3 /* OTP is powered down, SPROM is present */
+#define SSB_CHIPCO_CHST_4325_SDIO_USB_MODE      0x00000004
+#define SSB_CHIPCO_CHST_4325_SDIO_USB_MODE_SHIFT  2
+#define SSB_CHIPCO_CHST_4325_RCAL_VALID         0x00000008
+#define SSB_CHIPCO_CHST_4325_RCAL_VALID_SHIFT   3
+#define SSB_CHIPCO_CHST_4325_RCAL_VALUE         0x000001F0
+#define SSB_CHIPCO_CHST_4325_RCAL_VALUE_SHIFT   4
+#define SSB_CHIPCO_CHST_4325_PMUTOP_2B          0x00000200 /* 1 for 2b, 0 for to 2a */
 
 
 
@@ -353,11 +553,20 @@
 struct ssb_device;
 struct ssb_serial_port;
 
+/* Data for the PMU, if available.
+ * Check availability with ((struct ssb_chipcommon)->capabilities & SSB_CHIPCO_CAP_PMU)
+ */
+struct ssb_chipcommon_pmu {
+        u8 rev;                 /* PMU revision */
+        u32 crystalfreq;        /* The active crystal frequency (in kHz) */
+};
+
 struct ssb_chipcommon {
         struct ssb_device *dev;
         u32 capabilities;
         /* Fast Powerup Delay constant */
         u16 fast_pwrup_delay;
+        struct ssb_chipcommon_pmu pmu;
 };
 
 static inline bool ssb_chipco_available(struct ssb_chipcommon *cc)
@@ -365,6 +574,17 @@ static inline bool ssb_chipco_available(struct ssb_chipcommon *cc)
         return (cc->dev != NULL);
 }
 
+/* Register access */
+#define chipco_read32(cc, offset)       ssb_read32((cc)->dev, offset)
+#define chipco_write32(cc, offset, val) ssb_write32((cc)->dev, offset, val)
+
+#define chipco_mask32(cc, offset, mask) \
+                chipco_write32(cc, offset, chipco_read32(cc, offset) & (mask))
+#define chipco_set32(cc, offset, set) \
+                chipco_write32(cc, offset, chipco_read32(cc, offset) | (set))
+#define chipco_maskset32(cc, offset, mask, set) \
+                chipco_write32(cc, offset, (chipco_read32(cc, offset) & (mask)) | (set))
+
 extern void ssb_chipcommon_init(struct ssb_chipcommon *cc);
 
 extern void ssb_chipco_suspend(struct ssb_chipcommon *cc);
@@ -406,4 +626,8 @@ extern int ssb_chipco_serial_init(struct ssb_chipcommon *cc,
                                   struct ssb_serial_port *ports);
 #endif /* CONFIG_SSB_SERIAL */
 
+/* PMU support */
+extern void ssb_pmu_init(struct ssb_chipcommon *cc);
+
+
 #endif /* LINUX_SSB_CHIPCO_H_ */