Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Broadcom specific AMBA
3 * ChipCommon core driver
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11#include "bcma_private.h"
12#include <linux/export.h>
13#include <linux/bcma/bcma.h>
14
15static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
16 u32 mask, u32 value)
17{
18 value &= mask;
19 value |= bcma_cc_read32(cc, offset) & ~mask;
20 bcma_cc_write32(cc, offset, value);
21
22 return value;
23}
24
25void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
26{
27 u32 leddc_on = 10;
28 u32 leddc_off = 90;
29
30 if (cc->setup_done)
31 return;
32
33 if (cc->core->id.rev >= 11)
34 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
35 cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
36 if (cc->core->id.rev >= 35)
37 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
38
39 if (cc->core->id.rev >= 20) {
40 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, 0);
41 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, 0);
42 }
43
44 if (cc->capabilities & BCMA_CC_CAP_PMU)
45 bcma_pmu_init(cc);
46 if (cc->capabilities & BCMA_CC_CAP_PCTL)
47 bcma_err(cc->core->bus, "Power control not implemented!\n");
48
49 if (cc->core->id.rev >= 16) {
50 if (cc->core->bus->sprom.leddc_on_time &&
51 cc->core->bus->sprom.leddc_off_time) {
52 leddc_on = cc->core->bus->sprom.leddc_on_time;
53 leddc_off = cc->core->bus->sprom.leddc_off_time;
54 }
55 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
56 ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
57 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
58 }
59
60 cc->setup_done = true;
61}
62
63/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
64void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
65{
66 /* instant NMI */
67 bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
68}
69
70void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
71{
72 bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
73}
74
75u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
76{
77 return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
78}
79
80u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
81{
82 return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
83}
84
85u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
86{
87 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
88}
89
90u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
91{
92 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
93}
94
95u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
96{
97 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
98}
99EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
100
101u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
102{
103 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
104}
105
106u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
107{
108 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
109}
110
111#ifdef CONFIG_BCMA_DRIVER_MIPS
112void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
113{
114 unsigned int irq;
115 u32 baud_base;
116 u32 i;
117 unsigned int ccrev = cc->core->id.rev;
118 struct bcma_serial_port *ports = cc->serial_ports;
119
120 if (ccrev >= 11 && ccrev != 15) {
121 /* Fixed ALP clock */
122 baud_base = bcma_pmu_alp_clock(cc);
123 if (ccrev >= 21) {
124 /* Turn off UART clock before switching clocksource. */
125 bcma_cc_write32(cc, BCMA_CC_CORECTL,
126 bcma_cc_read32(cc, BCMA_CC_CORECTL)
127 & ~BCMA_CC_CORECTL_UARTCLKEN);
128 }
129 /* Set the override bit so we don't divide it */
130 bcma_cc_write32(cc, BCMA_CC_CORECTL,
131 bcma_cc_read32(cc, BCMA_CC_CORECTL)
132 | BCMA_CC_CORECTL_UARTCLK0);
133 if (ccrev >= 21) {
134 /* Re-enable the UART clock. */
135 bcma_cc_write32(cc, BCMA_CC_CORECTL,
136 bcma_cc_read32(cc, BCMA_CC_CORECTL)
137 | BCMA_CC_CORECTL_UARTCLKEN);
138 }
139 } else {
140 bcma_err(cc->core->bus, "serial not supported on this device ccrev: 0x%x\n", ccrev);
141 return;
142 }
143
144 irq = bcma_core_mips_irq(cc->core);
145
146 /* Determine the registers of the UARTs */
147 cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
148 for (i = 0; i < cc->nr_serial_ports; i++) {
149 ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
150 (i * 256);
151 ports[i].irq = irq;
152 ports[i].baud_base = baud_base;
153 ports[i].reg_shift = 0;
154 }
155}
156#endif /* CONFIG_BCMA_DRIVER_MIPS */