OMAP4: hwmod: Replace RSTCTRL absolute address with offset macros
The RSTCTRL register was accessed using an absolute address.
The usage of hardcoded macros to calculate virtual address from physical
one should be avoided as much as possible.
The usage of an offset will allow future improvement like migration from
the current architecture code toward a module driver.
Update prm_xxx accessors, move definition to the proper header file and
update copyrights.
Change the s16 register offset parameter to u16.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: use '_prminst_' in function names that are part of the
prminst44xx.c file]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index a2a04bfa..faec860 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -1,7 +1,7 @@
/*
* OMAP4 PRM module functions
*
- * Copyright (C) 2010 Texas Instruments, Inc.
+ * Copyright (C) 2011 Texas Instruments, Inc.
* Copyright (C) 2010 Nokia Corporation
* Benoît Cousson
* Paul Walmsley
@@ -24,12 +24,6 @@
#include "prm44xx.h"
#include "prm-regbits-44xx.h"
-/*
- * Address offset (in bytes) between the reset control and the reset
- * status registers: 4 bytes on OMAP4
- */
-#define OMAP4_RST_CTRL_ST_OFFSET 4
-
/* PRM low-level functions */
/* Read a register in a CM/PRM instance in the PRM module */
@@ -94,91 +88,6 @@
return omap4_prm_rmw_inst_reg_bits(bits, 0x0, inst, reg);
}
-/**
- * omap4_prm_is_hardreset_asserted - read the HW reset line state of
- * submodules contained in the hwmod module
- * @rstctrl_reg: RM_RSTCTRL register address for this module
- * @shift: register bit shift corresponding to the reset line to check
- *
- * Returns 1 if the (sub)module hardreset line is currently asserted,
- * 0 if the (sub)module hardreset line is not currently asserted, or
- * -EINVAL upon parameter error.
- */
-int omap4_prm_is_hardreset_asserted(void __iomem *rstctrl_reg, u8 shift)
-{
- if (!cpu_is_omap44xx() || !rstctrl_reg)
- return -EINVAL;
-
- return omap4_prm_read_bits_shift(rstctrl_reg, (1 << shift));
-}
-
-/**
- * omap4_prm_assert_hardreset - assert the HW reset line of a submodule
- * @rstctrl_reg: RM_RSTCTRL register address for this module
- * @shift: register bit shift corresponding to the reset line to assert
- *
- * Some IPs like dsp, ipu or iva contain processors that require an HW
- * reset line to be asserted / deasserted in order to fully enable the
- * IP. These modules may have multiple hard-reset lines that reset
- * different 'submodules' inside the IP block. This function will
- * place the submodule into reset. Returns 0 upon success or -EINVAL
- * upon an argument error.
- */
-int omap4_prm_assert_hardreset(void __iomem *rstctrl_reg, u8 shift)
-{
- u32 mask;
-
- if (!cpu_is_omap44xx() || !rstctrl_reg)
- return -EINVAL;
-
- mask = 1 << shift;
- omap4_prm_rmw_reg_bits(mask, mask, rstctrl_reg);
-
- return 0;
-}
-
-/**
- * omap4_prm_deassert_hardreset - deassert a submodule hardreset line and wait
- * @rstctrl_reg: RM_RSTCTRL register address for this module
- * @shift: register bit shift corresponding to the reset line to deassert
- *
- * Some IPs like dsp, ipu or iva contain processors that require an HW
- * reset line to be asserted / deasserted in order to fully enable the
- * IP. These modules may have multiple hard-reset lines that reset
- * different 'submodules' inside the IP block. This function will
- * take the submodule out of reset and wait until the PRCM indicates
- * that the reset has completed before returning. Returns 0 upon success or
- * -EINVAL upon an argument error, -EEXIST if the submodule was already out
- * of reset, or -EBUSY if the submodule did not exit reset promptly.
- */
-int omap4_prm_deassert_hardreset(void __iomem *rstctrl_reg, u8 shift)
-{
- u32 mask;
- void __iomem *rstst_reg;
- int c;
-
- if (!cpu_is_omap44xx() || !rstctrl_reg)
- return -EINVAL;
-
- rstst_reg = rstctrl_reg + OMAP4_RST_CTRL_ST_OFFSET;
-
- mask = 1 << shift;
-
- /* Check the current status to avoid de-asserting the line twice */
- if (omap4_prm_read_bits_shift(rstctrl_reg, mask) == 0)
- return -EEXIST;
-
- /* Clear the reset status by writing 1 to the status bit */
- omap4_prm_rmw_reg_bits(0xffffffff, mask, rstst_reg);
- /* de-assert the reset control line */
- omap4_prm_rmw_reg_bits(mask, 0, rstctrl_reg);
- /* wait the status to be set */
- omap_test_timeout(omap4_prm_read_bits_shift(rstst_reg, mask),
- MAX_MODULE_HARDRESET_WAIT, c);
-
- return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0;
-}
-
void omap4_prm_global_warm_sw_reset(void)
{
u32 v;