2 * Broadcom BCM63xx Processor Monitor Bus shared routines (SMP and reset)
4 * Copyright (C) 2015, Broadcom Corporation
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation version 2.
11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12 * kind, whether express or implied; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 #ifndef __BCM63XX_PMB_H
17 #define __BCM63XX_PMB_H
20 #include <linux/types.h>
21 #include <linux/delay.h>
22 #include <linux/err.h>
24 /* PMB Master controller register */
26 #define PMC_PMBM_START (1 << 31)
27 #define PMC_PMBM_TIMEOUT (1 << 30)
28 #define PMC_PMBM_SLAVE_ERR (1 << 29)
29 #define PMC_PMBM_BUSY (1 << 28)
30 #define PMC_PMBM_READ (0 << 20)
31 #define PMC_PMBM_WRITE (1 << 20)
32 #define PMB_WR_DATA 0x04
33 #define PMB_TIMEOUT 0x08
34 #define PMB_RD_DATA 0x0C
36 #define PMB_BUS_ID_SHIFT 8
38 /* Perform the low-level PMB master operation, shared between reads and
41 static inline int __bpcm_do_op(void __iomem *master, unsigned int addr,
44 unsigned int timeout = 1000;
47 cmd = (PMC_PMBM_START | op | (addr & 0xff) << 12 | off);
48 writel(cmd, master + PMB_CTRL);
50 cmd = readl(master + PMB_CTRL);
51 if (!(cmd & PMC_PMBM_START))
54 if (cmd & PMC_PMBM_SLAVE_ERR)
57 if (cmd & PMC_PMBM_TIMEOUT)
61 } while (timeout-- > 0);
66 static inline int bpcm_rd(void __iomem *master, unsigned int addr,
71 ret = __bpcm_do_op(master, addr, off >> 2, PMC_PMBM_READ);
72 *val = readl(master + PMB_RD_DATA);
77 static inline int bpcm_wr(void __iomem *master, unsigned int addr,
82 writel(val, master + PMB_WR_DATA);
83 ret = __bpcm_do_op(master, addr, off >> 2, PMC_PMBM_WRITE);
88 #endif /* __BCM63XX_PMB_H */